Terms of Service

Last Updated: November 25, 2025

Welcome to R4 Chat! Your use of our services, including the services we make available through this website and all related websites, mobile sites, data files, visualizations, and applications (collectively, the "Site"), and all software or services offered by us in connection with any of those (collectively, the "Services"), is governed by these terms of service (the "Terms"), so please carefully read them before using the Services.

For the purposes of these Terms, "we," "our," "us," and "R4 Chat" refer to the providers and operators of the Services.

IMPORTANT NOTICE: NATURE OF SERVICE

R4 Chat is a technical intermediary service platform (API aggregation platform), NOT a developer, trainer, or direct provider of generative AI models.

Service Definition

According to the Interim Measures for the Management of Generative Artificial Intelligence Services (for Chinese mainland users):

• Generative AI Service Provider: An organization or individual that uses generative AI technology to provide generative AI services (including through programmable interfaces)
• R4 Chat's Role: R4 Chat itself does not use generative AI technology to directly generate content, but rather serves as a technical tool to help users connect to third-party generative AI services of their own choosing

Specific services provided by R4 Chat:

• Providing a unified user interface for users to select and access third-party AI model APIs according to their own needs
• Acting as a technical intermediary, transmitting information between users and the third-party AI service providers chosen by users according to user instructions
• Providing auxiliary functions such as account management and conversation history storage

R4 Chat does NOT:

• Develop, train, or operate any AI models
• Independently decide which AI model to use (chosen by users)
• Control or influence AI model outputs
• Bear responsibility for AI model behavior or outputs
• Represent or act as agent for any third-party AI service provider

All AI functionality you access through R4 Chat is independently provided and operated by third-party providers (such as OpenAI, Anthropic, Google, DeepSeek, etc.). These third-party providers bear independent responsibility for the compliance, availability, and output content of their services. Your choice of which provider's service to use is entirely your own decision.

Relationship with Applicable Regulations

We fully understand the legislative purpose of the Interim Measures for the Management of Generative Artificial Intelligence Services (for Chinese mainland users). According to these Measures:

1. Article 6 requires: Providers shall lawfully conduct training data processing activities such as pre-training and optimization training — R4 Chat does not conduct any model training activities
2. Article 7 requires: Providers shall lawfully verify the legality of training data sources — R4 Chat does not process training data
3. Article 8 requires: Providers shall take measures in algorithm design, training data selection, etc. — R4 Chat does not participate in algorithm design or training

The above provider obligations should be assumed by each third-party AI model provider (such as OpenAI, DeepSeek, etc.) according to their respective applicable laws.

R4 Chat, as a technical intermediary platform, will cooperate in fulfilling the following obligations:

• Establishing complaint and reporting mechanisms (Article 15)
• Lawfully handling illegal content (Article 14)
• Cooperating with supervision and inspection by relevant authorities

1. Acceptance of Terms

In order to use the Services, you must first agree to these Terms. If you are registering for or using the Services on behalf of an organization, you are agreeing to these Terms for that organization and promising that you have the authority to bind that organization to these Terms. In that case, "you" and "your" will also refer to that organization, wherever possible.

You must be over 18 years of age to use the Services, and users under the age of 18 cannot use or register for the Services.

Minors Protection Notice:

1. Age Restriction: This Service is only available to adults (18 years and older); we do not provide services to minors
2. Discovery Handling: If we discover a user is a minor, we will immediately terminate the account and delete related data
3. Guardian Responsibility: If a minor uses this Service without guardian consent, the legal responsibility is borne by the guardian
4. Reporting Mechanism: If you discover minors using this Service, please report to us at support@r4.chat

BY USING, DOWNLOADING, INSTALLING, OR OTHERWISE ACCESSING THE SERVICES OR ANY MATERIALS INCLUDED IN OR WITH THE SERVICES, YOU HEREBY AGREE TO BE BOUND BY THESE TERMS. IF YOU DO NOT ACCEPT THESE TERMS, THEN YOU MAY NOT USE, DOWNLOAD, INSTALL, OR OTHERWISE ACCESS THE SERVICES.

Important Clause Notice

We hereby draw your attention to the following clauses that have significant bearing on your interests. Please read and fully understand them:

• Section 7 (Third-Party AI Services): Explains our relationship with third-party AI providers and the allocation of responsibilities
• Section 9.1 (Cross-Border Data Transfer): Using overseas AI models will result in cross-border data transfer
• Section 12 (Disclaimer of Warranties): Explains the risks and limitations of the Services
• Section 13 (Limitation of Liability): Explains the scope of our liability and compensation limits
• Section 15.2 (Complete User Responsibility): Explains your responsibilities as a user
• Section 16 (User Responsibility and Indemnification): Explains situations where you may be liable for indemnification

The above clauses are marked in bold, underlined, or other prominent ways. If you do not agree to any of the above clauses, please do not use the Services. Your continued use of the Services constitutes your acknowledgment that you have read, understood, and agreed to the above clauses.

Confirmation and Understanding of Terms

You confirm that:

1. Full Reading: You have completely read and understood the entire contents of these Terms
2. Independent Judgment: You have decided to accept these Terms based on your own independent judgment, not relying on any external representations
3. Opportunity for Professional Consultation: You had the opportunity to consult legal professionals before accepting these Terms
4. No Coercion: You are voluntarily accepting these Terms without any coercion or undue influence
5. Fairness of Terms: Considering the nature of the Services, pricing, and risk allocation, the provisions of these Terms are fair and reasonable

You agree that:

1. All provisions in these Terms represent the true intentions of both parties
2. These Terms do not fall under the circumstances of invalidity specified in Article 497 of the Civil Code of the People's Republic of China
3. If you have questions about the Terms, you should consult us at support@r4.chat before using the Services
4. Using the Services without consultation is deemed acceptance of all Terms without objection

Rules for Interpretation of Terms:

1. These Terms shall be interpreted as a whole, with each clause complementing the others
2. Headings are for convenience only and do not affect the meaning of the clauses
3. Words such as "including" and "for example" are illustrative and not exhaustive
4. The Chinese version of these Terms is the official version; in case of discrepancy with other language versions, the Chinese version shall prevail

2. Accounts

You must register an account with us (a "User Account") in order to use the Services. You agree to provide accurate and complete information in the creation of your User Account and agree to update this information with any changes. In accordance with applicable laws and regulations, we may require users in certain regions to provide additional identity verification information. Your User Account is for your personal use only and you may not authorize others to use your account. You are responsible for ensuring that your access credentials are kept confidential and are not disclosed to any third party, and for all activity that occurs under your User Account. You agree to notify us immediately upon learning of any unauthorized access to your User Account or any other suspected security breach.

3. User Content

You will be able to upload, create, host, transmit, share, publish or display information (such as data files, written text, computer software, music, audio files or other sounds, photographs, videos or other images) through use of the Services. All such information is referred to below as "User Content."

You are solely responsible for the development, content, and use of the User Content you upload to R4 Chat and you assume all risks associated with them, including intellectual property or other legal claims. By storing User Content with R4 Chat, you represent that you have all necessary rights to store and use that User Content, and that doing so does not conflict with, violate or misappropriate any third party legal rights, conflict with licenses you've granted to others, or violate any applicable law, regulations, or any of our Terms.

You agree to immediately take down any User Content that violates these Terms, including pursuant to a takedown request from R4 Chat. R4 Chat doesn't actively monitor the User Content you upload, download or share. However, we reserve the right, in our sole discretion, to review and remove User Content and/or suspend your access to your account in the event we become aware that your use of our Services or User Content violates any of our Terms, or any applicable law and/or regulations.

4. Intellectual Property

4.1 License Grant

By submitting, posting or otherwise uploading User Content on or through the Services, you grant R4 Chat the following limited license:

4.1.1 License Scope

You grant R4 Chat a non-exclusive license solely for the following purposes:

1. Service Provision: Transmitting your input content to third-party AI service providers to obtain responses
2. Feature Implementation: Storing conversation history to enable history features
3. Technical Support: Accessing relevant data to resolve issues when you request technical support
4. Service Improvement: Analyzing service usage in anonymized, de-identified form (not including your specific content)

4.1.2 License Restrictions

This license explicitly does NOT include:

• Using your content for AI model training
• Selling or licensing your content to third parties
• Publicly displaying or publishing your content (unless you actively share it)
• Using your content for any commercial purposes other than those listed above

4.1.3 License Duration

This license terminates when:

• You delete the relevant content
• You cancel your account
• The Services are terminated

4.1.4 Confidentiality Obligation

We commit to keeping your User Content confidential, unless:

• You explicitly consent to disclosure
• Disclosure is required by law
• Disclosure is necessary to protect our or third parties' legitimate interests

4.2 Your Rights

Except as provided above, R4 Chat acknowledges and agrees that it obtains no right, title or interest from you (or your licensors) under these Terms in or to any User Content that you create, upload, submit, post, transmit, share or display on, or through, the Services, including any intellectual property rights which subsist in that User Content.

4.3 Our Rights

You acknowledge and agree that R4 Chat (and/or R4 Chat's licensors) own all legal right, title and interest in and to the Services and R4 Chat-Supplied Content and that the Services and R4 Chat-Supplied Content are protected by copyrights, trademarks, patents, or other proprietary rights and laws. Nothing in these Terms authorizes you to use any of R4 Chat's trademarks, logos, domain names, or other distinctive brand features except as otherwise permitted by law.

5. License and Restrictions

5.1 License Grant

R4 Chat grants you a personal, non-exclusive, non-transferable, non-sublicensable, revocable license to use the Services solely in the manner permitted by these Terms. This license may be revoked by R4 Chat at any time without giving reasons.

5.2 Prohibited Conduct

You may not (and you may not permit or assist others to):

1. Technical Restrictions

   • Copy, modify, create derivative works of, reverse engineer, decompile or otherwise attempt to extract the source code of the Services or any part thereof
   • Attempt to disable, bypass, or circumvent any security mechanisms, rate limits, or access controls used by the Services
   • Use any automated tools (bots, crawlers, scripts, etc.) to access the Services unless with our written permission

2. Commercial Restrictions

   • Rent, lease, sell, resell, sublicense, or otherwise commercialize the Services to third parties
   • Use the Services to provide similar services to third parties or create competing products
   • Access the Services in a manner intended to avoid incurring fees or exceeding usage limits
   • Collect evidence or access the Services for the purpose of bringing any legal action (including IP litigation) against R4 Chat

3. Usage Restrictions

   • Engage in any activity that interferes with or disrupts the Services
   • Share account access credentials or allow multiple persons to use the same account
   • Circumvent any content filtering or moderation systems
   • Submit malicious content that may damage R4 Chat's or third parties' systems

5.3 Consequences of Violations

If you violate any of the above restrictions, R4 Chat has the right to:

1. Immediately terminate or suspend your account without prior notice
2. Delete any violating content
3. Withhold any account balance as liquidated damages
4. Pursue legal action against you, including but not limited to claims for infringement damages
5. Report your illegal activities to relevant authorities

6. Acceptable Use

6.1 General Rules for All Users

Regardless of your location, you agree not to upload, record, publish, post, link to, transmit or distribute User Content, or otherwise utilize the Services in a manner that:

• Generates violent, obscene, pornographic content, or false and harmful information
• Generates discriminatory content based on race, religion, gender, age, disability, etc.
• Infringes upon the intellectual property rights, portrait rights, privacy rights, or reputation rights of others
• Attempts to mislead others about your identity or the origin of communications, or impersonates others
• Is harmful to minors
• Utilizes or contains any malware, viruses, Trojan horses, or other programs that may damage systems, data, or property of others
• Violates applicable laws and regulations in your region

6.2 Additional Rules for Users in the Chinese Mainland

In accordance with the Interim Measures for the Management of Generative Artificial Intelligence Services and related laws, users in the Chinese mainland shall also comply with the following:

• Adhere to socialist core values
• Not generate content that incites subversion of state power, overthrow of the socialist system, endangers national security and interests, or damages the national image
• Not generate content that incites secession, undermines national unity and social stability
• Not generate content that promotes terrorism, extremism, ethnic hatred, or ethnic discrimination
• Not generate discriminatory content based on ethnicity, belief, nationality, region, gender, age, occupation, health, etc.

7. Third-Party AI Services

7.1 Nature of Service

R4 Chat is a technical intermediary platform, NOT an AI model provider. We only provide technical interfaces that enable you to access third-party AI service provider APIs. These third-party providers include but are not limited to:

• OpenAI (USA)
• Anthropic (USA)
• Google (USA)
• DeepSeek (China)
• Other models accessible through aggregation services like OpenRouter

7.2 Third-Party Responsibility

You understand and agree that:

1. Model Compliance: The development, training, registration, and compliance of each AI model is the responsibility of its respective provider. R4 Chat makes no representations or warranties regarding the compliance status of any third-party AI model.

2. Output Content: All content generated by AI is produced by third-party AI models. R4 Chat does not control, review, or edit these outputs, and therefore assumes no responsibility for their content.

3. Service Availability: The availability, performance, and functionality of third-party AI services depend entirely on their providers. R4 Chat does not guarantee the continued availability of these services.

4. Terms Binding: Your use of third-party AI models is bound by the respective third-party provider's terms of service and privacy policy. You are responsible for understanding and complying with these terms.

7.3 Content Labeling

For images, videos, and other content generated through this platform, labeling is the responsibility of the third-party AI model provider that generated the content. R4 Chat, as a technical intermediary, will pass through any labels already added by third-party providers as-is.

7.4 AI Limitations

AI-generated content may contain errors, inaccuracies, biases, or inappropriate material. You are responsible for reviewing and verifying any AI outputs before relying on them, and you bear full responsibility for the consequences of using these outputs. R4 Chat and its affiliates make no warranties of any kind regarding AI-generated content.

7.5 Intellectual Property Rights in AI Output

7.5.1 Current Status of Rights Attribution

There are currently no clear legal provisions regarding the attribution of intellectual property rights in AI-generated content. Different jurisdictions may have different interpretations.

7.5.2 R4 Chat's Position

• R4 Chat does not claim any intellectual property rights in AI-generated content
• R4 Chat does not guarantee that you have any intellectual property rights in AI-generated content
• Intellectual property issues related to AI-generated content should be determined according to each third-party AI provider's terms and applicable law

7.5.3 Usage Recommendations

• Before Commercial Use: We recommend reviewing the terms of use of the relevant AI provider
• Originality Requirements: AI-generated content may not meet originality requirements; please use with caution
• Risk Warning: AI-generated content may be similar to existing third-party works; please verify before use

7.5.4 Provider Policy Reference

The above information is for reference only. Please refer to each provider's latest terms.

7.6 User Choice and Responsibility

You may independently choose which third-party AI model to use. Your decision to use any particular AI model, and all consequences arising therefrom, are entirely your own responsibility. If you have concerns about the compliance, security, or suitability of any AI model, you should not use that model.

8. Pricing and Refunds

8.1 Pricing

Subject to the Terms, the Services are provided to you without charge up to certain usage limits, and usage in excess of these limits may require purchase of additional resources and the payment of fees.

8.1.1 Pricing Transparency

• Currency: All prices are listed in US Dollars (USD) unless otherwise specified
• Taxes: Listed prices are exclusive of taxes. You may be required to pay applicable taxes according to the laws of your region
• Third-Party Fees: Fees for using third-party AI models are included in our pricing; no additional payment to third parties is required
• Price Adjustments: Price adjustments may take effect at any time; we will provide advance notice when possible (see Section 10.1)

8.1.2 Fee Details

You can view the following at any time in your account settings:

• Current plan/subscription details
• Historical consumption records
• Remaining credits/usage
• Billing details and invoices

8.1.3 Dispute Resolution

If you have any questions or disputes about fees, please contact support@r4.chat within 30 days of receiving the bill. We will complete the review and respond within 7 business days.

Please see R4 Chat's settings page for more details regarding pricing for the Services.

8.2 Refund Policy

8.2.1 Subscription Services

• You may cancel your subscription at any time. Upon cancellation, the service will stop at the end of the current billing cycle
• Fees already paid for the current period are non-refundable (you may continue using until the end of the current period)
• If you have not used any paid features within 7 days of your first subscription, you may apply for a full refund

8.2.2 Account Balance

• Unused account balance may be refunded upon request
• Refund application: Send email to support@r4.chat with account information and refund reason
• Processing time: Refund completed within 7 business days after receiving valid application
• Refund method: Returned to the account used for original payment

8.2.3 Service Failure Compensation

If you are unable to use paid services due to technical failures on our part:

8.2.4 Non-Refundable Situations

• Account terminated due to your violation of these Terms
• Service unavailability due to third-party AI service providers
• Services already used or credits already consumed

9. Privacy and Cross-Border Data Transfer

These Services are provided in accordance with our Privacy Policy. You agree to the use of your User Content and personal information in accordance with these Terms and R4 Chat's Privacy Policy.

9.1 Important Notice on Cross-Border Data Transfer

[PLEASE NOTE] When you choose to use overseas third-party AI service providers (such as OpenAI, Anthropic, Google, etc.), your input content will be transferred to servers located outside your country operated by these providers.

In accordance with Articles 38 to 40 of the Personal Information Protection Law of the People's Republic of China (for users in Chinese mainland):

1. Right to Know: We hereby clearly inform you that using overseas AI models will result in cross-border data transfer
2. Right to Choose: You may choose to use only domestic AI models (such as DeepSeek) to avoid cross-border data transfer
3. Separate Consent: If you choose to use overseas AI models, it is deemed as your separate consent to that cross-border data transfer

Data Storage Locations for AI Models:

If you do not consent to cross-border data transfer, please use only domestic AI models or do not use this Service.

9.2 Other Privacy Obligations

You agree to protect the privacy and legal rights of your authorized users and any end users or third parties involved in the creation of your User Content. To the extent that your User Content and/or use of the Services requires compliance with specialized data privacy laws, you understand and agree that you are solely responsible for compliance with such laws.

10. Modification and Termination

10.1 Service Changes

R4 Chat is constantly innovating in order to provide the best possible experience for its users.

10.1.1 Types of Changes and Notification Methods

10.1.2 User Rights

• If service changes significantly reduce the value of your paid services, you may apply for a pro-rata refund before the changes take effect
• You may export your data before changes take effect
• Continued use of the Services after changes take effect constitutes acceptance of the changes

10.2 Account Cancellation

10.2.1 User-Initiated Cancellation

You may request to cancel your account at any time:

10.2.2 Consequences of Cancellation

After account cancellation:

• ❌ Account and its data cannot be recovered
• ❌ Cannot continue using purchased services
• ❌ Unused paid balance will be forfeited (please apply for refund before cancellation)
• ✅ Your personal information will be deleted according to these Terms and Privacy Policy

10.2.3 R4 Chat-Initiated Termination

R4 Chat may terminate or suspend your account in the following circumstances:

• You violate these Terms or applicable laws and regulations
• Your account poses a security risk or is used for fraudulent activities
• We receive a lawful request from competent authorities
• We cease to provide the Services for business reasons (in which case we will provide advance notice)

For account termination due to your violation of the Terms, fees already paid will not be refunded. For service termination due to our reasons, we will refund unused prepaid fees on a pro-rata basis as appropriate.

10.3 Data Export

You are solely responsible for exporting your User Content from the Services prior to termination of your account for any reason, provided that if we terminate your account for our convenience, we will endeavor to provide you a reasonable opportunity to retrieve your User Content.

11. Complaints and Reports

We have established a complaint and reporting mechanism. If you discover any illegal content or behavior, you can report it through the following channels:

• Email: support@r4.chat

We will promptly accept and process your complaints and reports and provide feedback on the results.

12. Disclaimer of Warranties

12.1 "AS IS" Service

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, R4 CHAT PROVIDES THE SERVICES ON AN "AS IS," "AS AVAILABLE," AND "WITH ALL FAULTS" BASIS, WITHOUT ANY WARRANTIES OF ANY KIND, WHETHER EXPRESS OR IMPLIED.

R4 CHAT EXPRESSLY DISCLAIMS THE FOLLOWING WARRANTIES (TO THE EXTENT PERMITTED BY LAW):

1. Merchantability: That the Services are suitable for general commercial use
2. Fitness for a Particular Purpose: That the Services are suitable for your specific purposes
3. Non-Infringement: That the Services do not infringe any third-party rights
4. Accuracy: The accuracy of the Services or AI output content
5. Uninterrupted Service: The continuous availability of the Services
6. Security: That the Services are completely secure or error-free

12.2 Special Risk Warnings

BY USING THE SERVICES, YOU ACKNOWLEDGE AND ACCEPT THE FOLLOWING RISKS:

1. AI Content Risk: AI-generated content may be completely incorrect, misleading, harmful, or inappropriate. You should NOT rely on AI output as a substitute for professional advice (including but not limited to legal, medical, or financial advice)
2. Third-Party Service Risk: Third-party AI services may be changed, interrupted, or terminated at any time, beyond our control
3. Data Risk: Despite our security measures, we cannot guarantee absolute data security
4. Compliance Risk: Laws and regulations may change; third-party services' compliance status may change
5. Business Risk: The Services may not meet your business expectations or needs

YOU CONFIRM THAT YOU HAVE VOLUNTARILY CHOSEN TO USE THE SERVICES WITH FULL UNDERSTANDING OF THE ABOVE RISKS.

12.3 Statutory Rights Reserved

Under mandatory provisions of applicable law, the following rights are not affected by this disclaimer:

1. Your right to recourse when damage is caused by our intentional misconduct
2. Recall obligations when products have defects endangering personal safety

EXCEPT FOR THE ABOVE STATUTORY RESERVATIONS, THIS DISCLAIMER SHALL BE ENFORCED TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW.

13. Limitation of Liability

13.1 Scope of Non-Liability

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, R4 CHAT SHALL NOT BE LIABLE FOR:

1. Third-Party Actions: Any actions, service interruptions, content outputs, data processing, or other conduct by third-party AI service providers
2. AI Output Content: The accuracy, legality, appropriateness, or completeness of any AI-generated content
3. User Actions: Any user's actions, content, or manner of using the Services
4. Force Majeure: Any events beyond R4 Chat's reasonable control
5. Indirect Damages: Any indirect, incidental, special, punitive, or consequential damages, including but not limited to loss of profits, data loss, goodwill loss, business interruption, etc.
6. Service Interruption: Service interruptions due to maintenance, upgrades, network failures, or other technical reasons
7. Third-Party Service Changes: Changes to or termination of third-party AI provider services or APIs

13.2 Liability Cap

TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, regardless of the legal theory (contract, tort, strict liability, or otherwise), R4 Chat's total liability to you for the Services shall not exceed:

13.3 Statutory Exceptions

Under mandatory legal provisions, the following liability is not subject to the above limitations:

1. Liability for personal injury caused by intentional misconduct or gross negligence
2. Other liability that cannot be excluded or limited by law

EXCEPT FOR THE ABOVE STATUTORY EXCEPTIONS, THE LIABILITY LIMITATION PROVISIONS OF THESE TERMS SHALL BE ENFORCED TO THE MAXIMUM EXTENT POSSIBLE.

13.4 Reasonableness of Risk Allocation

YOU CONFIRM THAT THE LIABILITY LIMITATION PROVISIONS IN THESE TERMS REFLECT A REASONABLE ALLOCATION OF RISK BETWEEN THE PARTIES:

1. R4 Chat provides low-cost/free technical intermediary services
2. R4 Chat cannot control the actions of third-party AI service providers
3. R4 Chat cannot foresee or control how users use the Services
4. Service pricing has considered the above liability limitation factors

WITHOUT THE ABOVE LIABILITY LIMITATIONS, R4 CHAT WOULD BE UNABLE TO PROVIDE THE SERVICES AT CURRENT PRICES.

14. Changes to Terms

These Terms may be amended or updated from time to time without notice and may have changed since your last visit to the website or use of the Services. It is your responsibility to review these Terms for any changes. By continuing to access or use the Services after revisions become effective, you agree to be bound by the revised Terms. If you do not agree to the new Terms, please stop using the Services. Please visit this page regularly to review these Terms for any changes.

15. Governing Law and Dispute Resolution

15.1 Nature of Service and Commercial Scope

You expressly understand and agree that the legal relationship between R4 Chat and you is limited to the following scope:

1. Technical Service Provision: We provide you with technical interfaces to access third-party AI APIs
2. Account Services: We provide account registration, management, and authentication services
3. Paid Services: We charge fees for the above technical services

Our relationship with you does NOT include:

• We are not the creator, publisher, or distributor of AI content
• We are not an agent, representative, or guarantor of third-party AI services
• We assume no editorial, review, or legal responsibility for AI output content

15.2 Complete User Responsibility

You understand and agree to assume the following complete responsibilities:

1. Compliance Responsibility: You are responsible for ensuring that your use of the Services complies with all applicable laws and regulations in your jurisdiction. This includes ensuring that you have the right to use the AI models you select.

2. Selection Responsibility: Your choice of which third-party AI model to use is entirely your personal decision. If a model has not obtained necessary licenses, registrations, or approvals in your region, you should not use that model.

3. Content Responsibility: You bear full responsibility for all content you input through the Services and for your use of AI output content.

4. Indemnification Responsibility: If your violation of these Terms or applicable laws results in any loss, damage, fines, or expenses (including attorney fees) to R4 Chat, you agree to fully indemnify R4 Chat.

15.3 Defense Against Third-Party Claims

If any third party (including but not limited to government agencies, regulatory authorities, other users, or any other entity) makes claims, demands, or takes legal action against R4 Chat regarding your use of the Services:

1. Notification Obligation: We will promptly notify you of such claims
2. User Defense Responsibility: You shall assume defense responsibility at your own expense
3. Indemnification Obligation: You shall indemnify R4 Chat for all losses incurred as a result

15.4 Applicable Law

For interpretation and enforcement of these Terms:

• Users in the Chinese mainland: Laws of the People's Republic of China apply (excluding the laws of Hong Kong SAR, Macau SAR, and Taiwan region)
• Users in other regions: Laws of your region apply

15.5 Dispute Resolution

Any dispute arising from or related to these Terms shall be resolved in accordance with the following procedures:

15.5.1 Negotiation (Mandatory Pre-Condition)

In the event of a dispute, the parties shall first attempt to resolve it through friendly negotiation. You must send a written dispute notice to us at support@r4.chat detailing the dispute. The negotiation period shall be 30 days from R4 Chat's receipt of the notice. Neither party may initiate arbitration or litigation without first completing the negotiation process.

15.5.2 Arbitration (Preferred Resolution)

YOU AGREE THAT, EXCEPT FOR MATTERS THAT MUST BE LITIGATED BY LAW, ANY DISPUTE ARISING FROM OR RELATED TO THESE TERMS SHALL BE SUBMITTED TO THE CHINA INTERNATIONAL ECONOMIC AND TRADE ARBITRATION COMMISSION (CIETAC) FOR ARBITRATION IN ACCORDANCE WITH ITS ARBITRATION RULES IN EFFECT AT THE TIME OF APPLICATION. THE PLACE OF ARBITRATION SHALL BE BEIJING. THE LANGUAGE OF ARBITRATION SHALL BE CHINESE. THE ARBITRATION AWARD SHALL BE FINAL AND BINDING ON BOTH PARTIES.

Arbitration costs shall be borne by the losing party; if there is partial success, the arbitration tribunal shall determine cost allocation based on each party's share of responsibility.

15.5.3 Litigation Jurisdiction

For disputes that are explicitly not subject to arbitration under law, the parties agree to exclusive jurisdiction of the competent courts in the location of R4 Chat's operating entity.

15.5.4 Statute of Limitations

YOU AGREE THAT ANY CLAIM OR CAUSE OF ACTION ARISING FROM THESE TERMS OR THE SERVICES MUST BE FILED WITHIN ONE (1) YEAR AFTER SUCH CLAIM OR CAUSE OF ACTION ARISES, OR IT SHALL BE PERMANENTLY BARRED. The limitation period agreed in these Terms is shorter than the statutory limitation period; you have been informed of and agree to this.

15.5.5 Class Action Waiver

TO THE MAXIMUM EXTENT PERMITTED BY LAW, YOU AGREE TO WAIVE YOUR RIGHT TO PARTICIPATE IN ANY CLASS ACTION, COLLECTIVE ARBITRATION, OR REPRESENTATIVE ACTION AGAINST R4 CHAT. ANY DISPUTE RESOLUTION PROCEEDING SHALL BE CONDUCTED SOLELY ON AN INDIVIDUAL BASIS AND NOT AS PART OF ANY CLASS OR REPRESENTATIVE ACTION.

15.6 Jurisdiction Limitation

You understand and agree that:

R4 Chat, as a technical intermediary service platform, has liability limited to technical service provision within the scope of normal commercial transactions. Any claims, demands, or legal actions beyond this scope, including but not limited to:

• Claims regarding the compliance of AI models themselves
• Claims regarding AI output content
• Claims regarding the actions of third-party AI service providers

Are unrelated to R4 Chat and should be directed to the relevant third-party AI service providers.

16. User Responsibility and Indemnification

16.1 Scope of User Responsibility

You agree to be responsible for damages caused by the following actions:

1. Violations of any provision of these Terms
2. Violations of applicable laws and regulations
3. Infringement of any third-party rights
4. Misuse of the Services
5. Content you input or your use of AI output content
6. Any issues related to the third-party AI models you choose to use

16.2 Indemnification Obligation

You agree to indemnify, defend, and hold harmless R4 Chat and its affiliates, directors, officers, employees, and agents from and against any and all claims, damages, losses, liabilities, costs, and expenses (including reasonable attorney fees) arising out of or related to:

1. Your violation of any provision of these Terms
2. Your violation of any applicable laws or regulations
3. Your infringement of any third party's rights
4. Your use of the Services
5. Any claims made by third parties against R4 Chat due to your actions

16.3 Limitation of Indemnification

Under the Civil Code of the People's Republic of China and other legal provisions, your indemnification liability may be reduced in the following circumstances:

1. Damage directly caused by R4 Chat's intentional misconduct or gross negligence
2. Damage caused by force majeure where you are without fault
3. Other circumstances for reducing liability as explicitly provided by law

The burden of proof for the above liability reduction circumstances shall be borne by you.

16.4 Handling of Third-Party Claims

If any third party makes claims against R4 Chat due to your actions:

1. R4 Chat will notify you of such claims (method of notification at R4 Chat's sole discretion)
2. You shall assume all defense responsibility at your own expense
3. R4 Chat has the right to decide independently whether to settle, defend, or take other measures
4. You shall indemnify R4 Chat for all losses incurred as a result, including but not limited to settlement amounts, judgment amounts, attorney fees, and other related expenses

16.5 Evidence and Burden of Proof

16.5.1 Evidentiary Effect

You agree that:

1. Service logs, system records, database records, and other electronic data retained by R4 Chat have evidentiary effect
2. The above electronic data may serve as basis for determining relevant facts
3. Unless you can provide sufficient contrary evidence, the above electronic data shall have priority in terms of probative value

16.5.2 Burden of Proof

1. When R4 Chat claims user breach, it will provide relevant system records as prima facie evidence
2. If users dispute system records, users shall bear the burden of proof to prove the records are inaccurate
3. Users claiming R4 Chat is at fault shall bear the burden of proof

16.5.3 Evidence Preservation

• R4 Chat will retain necessary service logs as required by law
• R4 Chat has no obligation to retain data beyond the statutory retention period
• Users should retain evidence related to their use of the Services themselves

17. Force Majeure and Service Interruption

17.1 Force Majeure

Neither party shall be liable for failure to perform its obligations under these Terms due to force majeure events. Force majeure events include, but are not limited to: natural disasters, war, terrorist attacks, government actions, changes in laws or regulations, cyber attacks, power outages, telecommunications failures, service interruptions or failures of third-party service providers (including AI model providers), and other events beyond the reasonable control of the parties.

17.2 Third-Party Service Interruption

You understand and agree that:

1. R4 Chat relies on third-party AI service provider APIs to provide services
2. These third-party services may be interrupted, changed, or terminated at any time, beyond R4 Chat's control
3. If a third-party service provider stops providing services for any reason (including but not limited to policy changes, compliance requirements, technical failures, etc.), R4 Chat assumes no responsibility for this
4. In such circumstances, R4 Chat's obligation is limited to making reasonable efforts to seek alternative services or refunding unused prepaid fees

18. Miscellaneous

18.1 Entire Agreement

These Terms, together with our Privacy Policy, constitute the entire agreement between the parties relating to the Services and all related activities, superseding all prior oral or written communications, representations, and agreements between the parties on the same subject matter.

18.2 Modifications

R4 Chat reserves the right to modify these Terms at any time. Modified Terms shall become effective upon posting on the website. Your continued use of the Services after modification of the Terms shall be deemed acceptance of the modified Terms.

18.3 Severability

If any part of these Terms is held by a court or arbitration body of competent jurisdiction to be illegal, invalid, or unenforceable:

1. That part shall be deemed severable and shall not affect the validity and enforceability of the remaining provisions
2. The invalid part shall be modified to a valid provision that most closely approximates the original intent to the extent permitted by law
3. The parties agree to be bound by such modified provisions

18.4 No Waiver

Failure or delay by R4 Chat to exercise any right under these Terms shall not constitute a waiver of such right, nor shall it prevent R4 Chat from exercising such right in the future. Any waiver must be made explicitly in writing.

18.5 Assignment

1. You may not assign these Terms or any rights or obligations thereunder without R4 Chat's prior written consent
2. R4 Chat may freely assign these Terms and all rights and obligations thereunder without your consent
3. Any attempted assignment in violation of these Terms shall be void

18.6 Independent Contractors

These Terms do not create any agency, partnership, joint venture, or employment relationship. The parties are independent contractors.

18.7 Third-Party Beneficiaries

Except as expressly provided in these Terms, these Terms do not grant any rights or benefits to any third party.

18.8 Survival

The following provisions shall survive termination of these Terms: Section 4 (Intellectual Property), Section 12 (Disclaimer of Warranties), Section 13 (Limitation of Liability), Section 15 (Governing Law and Dispute Resolution), Section 16 (User Responsibility and Indemnification), and any provisions that by their nature should survive termination.

18.9 Notices

1. Notices from R4 Chat to You: We may send notices to you via email, website announcements, or in-app notifications, which shall be deemed delivered upon sending
2. Notices from You to R4 Chat: Should be sent to legal@r4.chat and shall be deemed delivered upon our confirmation of receipt

18.10 Language

The Chinese version of these Terms is the official version. If there is any difference or conflict between the Chinese version and any other language version, the Chinese version shall prevail.

19. Contact Us

19.1 Contact Information

If you have any questions about these Terms of Service or if you wish to make any complaint or claim with respect to the Services, please contact us at:

• Customer Support: support@r4.chat
• Privacy Related: privacy@r4.chat
• Legal Related: legal@r4.chat

19.2 Complaint Processing

When submitting a complaint, please provide the following information for faster processing:

1. Your account information (registered email)
2. Detailed description of the complaint
3. Relevant evidence such as timestamps, screenshots, etc.
4. Your expected resolution

We will provide an initial response within 7 business days of receiving a valid complaint.