Terms of Service

Version: V1.0
Date of Publication: June 15, 2026
Effective Date: June 15, 2026

Service Provider: Shanghai Jiusi Xinyuan Intelligent Technology Co., Ltd. (hereinafter "we," "us," "our," or "Yio")
Registered/Business Address: DOBE Coworking Space, Building D, Lane 159 Haojing Road, Minhang District, Shanghai
Contact: hello [at] yio.chat

Welcome to Yio (hereinafter "Yio," "the Platform," or "the Service"). These Terms of Service (hereinafter the "Terms") constitute an agreement between you (hereinafter the "User" or "you") and Shanghai Jiusi Xinyuan Intelligent Technology Co., Ltd. governing your use of the Service.

These Terms apply to all Users, wherever you are located. We have drafted the main body of these Terms in a neutral manner intended for a global audience; differentiated requirements arising from the mandatory laws of particular countries or regions (such as Mainland China and the European Economic Area / United Kingdom) are set out together in the "Region-Specific Terms" at the end of this document. Where the Region-Specific Terms conflict with the main body, the Region-Specific Terms shall prevail in respect of the relevant region.

Please read and fully understand each provision of these Terms carefully, in particular those provisions that exclude or limit our liability, as well as the provisions on dispute resolution and governing law, which are closely related to your rights and interests. If you do not agree with any part of these Terms, please do not register an account or use the Service. Once you complete account registration or actually use the Service, you are deemed to have fully understood and agreed to be bound by these Terms.

How we collect, use, store, and protect your personal information (personal data) is governed by the Yio Privacy Policy, which forms an integral part of these Terms.

1. Definitions

• Yio: An AI customer success service product for enterprises.
• Enterprise User: The entity that registers a Yio account and uses the Service to build and operate an AI assistant for an enterprise.
• End Visitor: An individual who interacts with an Enterprise User's AI assistant through channels such as a shared link, an embeddable widget, or a custom domain.
• Knowledge Base: Documents, text, and other content uploaded or entered by an Enterprise User, used by the AI assistant to answer questions.
• AI Assistant: A service feature that automatically answers End Visitors' questions using generative artificial intelligence technology, based on the content of the Enterprise User's Knowledge Base.
• Personal Information (Personal Data): Various kinds of information recorded electronically or by other means relating to an identified or identifiable natural person, excluding information that has been anonymized; under the applicable laws of the European Economic Area / United Kingdom, this is referred to as "personal data."
• Processor (Controller): The entity that determines, on its own, the purposes and means of processing personal information; under the applicable laws of the European Economic Area / United Kingdom, this is referred to as the "controller."
• Entrusted Party (Processor): The entity that processes personal information on behalf of, and in accordance with the instructions of, the processor (controller); under the applicable laws of the European Economic Area / United Kingdom, this is referred to as the "processor."

2. Service Content and Means of Access

2.1 Service Content

Yio provides the following core services:

• Building a dedicated AI assistant based on the Knowledge Base content uploaded by an enterprise.
• Providing End Visitors with 24/7 intelligent question-and-answer services through channels such as shared links, embeddable website widgets, and custom domains.
• Providing customer management features such as visitor lead capture, archiving of unanswered questions, conversation history review, and basic data overviews.
• Providing private deployment options that support standalone operation within an enterprise's internal network.

We may also push notifications such as new leads and unanswered questions to enterprise internal groups on WeChat Work, DingTalk, Feishu, and similar tools (solely as a notification channel for Enterprise Users, and not as a conversation channel for End Visitors).

The Service is provided through the website (yio.chat) and via mobile browsers; we do not provide a standalone mobile application.

2.2 Means of Access

• Cloud Subscription (SaaS): Used online by registering an account.
• Private Deployment (Appliance): Deployed independently within an enterprise's internal network, subject to the procurement contract signed by both parties.

We may, from time to time, add, adjust, or discontinue certain features or service modules. The launch of new features or modules does not constitute a breach of these Terms.

3. Account Registration and Management

3.1 Eligibility

1. You must have the full legal capacity required to enter into and perform these Terms. If you do not have full legal capacity, you must use the Service with the consent and guidance of your statutory guardian. Age requirements for minors using the Service are further set out in the Region-Specific Terms at the end of this document.
2. If you register on behalf of an enterprise or other organization, you must ensure that you have obtained full authorization from that enterprise or organization, and that your registration and use of the account are legally binding on that enterprise or organization.

3.2 Registration and Login Methods

You may register and log in to the Service using an email address and password; we may add other registration or login methods from time to time and present them to you within the product.

3.3 Account Security

1. You are responsible for properly safeguarding your account information and password, and you must not lend, lease, transfer, or sell your account to others.
2. Except where caused by our fault, you bear the consequences arising from any unauthorized use of your account or disclosure of information attributable to you; if any of the foregoing occurs, please notify us immediately via hello [at] yio.chat.
3. If we discover a security risk or unauthorized use of an account, we have the right to take reasonable measures such as restricting login or requiring identity verification, and we will use reasonable efforts to notify you promptly.

3.4 Account Status

Your account may be in one of the following states:

• Free Plan: Entered by default upon registration; available long-term, with access to basic features.
• Paid: After subscribing to a paid plan, you enjoy the features and quotas of the corresponding tier.
• Suspended: Service suspended due to non-payment, violations, or similar reasons.

4. Plans, Billing, and Refunds

4.1 Plans and Pricing

The plan tiers, features, usage quotas, add-on packs, and specific pricing of the Service are subject to the real-time disclosures on the pricing page and checkout page of this product's official website. Add-on packs are available only to Users on paid tiers. We reserve the right to adjust prices; price adjustments do not affect services you have already purchased and that remain within their validity period, and will be disclosed in advance within the product.

4.2 Billing Methods

Different payment channels correspond to different billing rules:

• One-time periodic payment (applicable to Mainland China cloud subscriptions): A one-time payment for the period you select (quarterly or annually); the subscription does not auto-renew and is not auto-charged upon expiry.
• Card-based auto-renewing subscription (applicable to overseas bank-card payments by Users in other countries or regions): Automatically renews on a periodic basis. We will conspicuously remind you before the end of each renewal period and provide you with the means to cancel or disable auto-renewal at any time.
• Private deployment and custom services: Fees and payment methods are subject to the contract signed by both parties.

4.3 Expiry, Grace Period, and Downgrade

Before a paid plan expires, we will remind you to renew via in-product notification or email. A grace period applies after expiry, during which the Service continues to be available as usual. If you have not renewed after the grace period, your account will be downgraded to the Free Plan—we will not delete any of your data as a result, and content exceeding the free-tier capacity will be retained on a "read-only, no-deletion" basis.

4.4 Refunds

Except as otherwise provided by laws and regulations or as otherwise committed by us in writing, subscription fees that have taken effect or been used are non-refundable; you may stop subsequent renewals at any time. Refunds for private deployment and custom services are subject to the contract between the parties. Where the law grants you statutory rights of withdrawal or refund that cannot be excluded by agreement, please refer to the Region-Specific Terms at the end of this document.

5. Acceptable Use

5.1 Lawful Use

When using the Service, you must comply with the laws and regulations applicable to you. Regardless of where you are located, you must not use the Service to engage in any of the following:

1. Uploading Knowledge Base materials containing unlawful, obscene, violent, terrorist, or discriminatory content, or content that endangers national security, public security, or the public interest.
2. Using the AI assistant to generate or disseminate false information, or to engage in fraud, false advertising, or the misleading of consumers.
3. Collecting other persons' personal information (personal data) through the Service without lawful authorization.
4. Reverse engineering, decompiling, or disassembling the Service, or attempting to extract model parameters.
5. Maliciously consuming service resources or attacking the system through automated means.
6. Engaging in unfair competition, or other acts that violate applicable laws and regulations or infringe the lawful rights and interests of others.

Additional compliance obligations applicable to use of the Service in particular countries or regions are set out in the Region-Specific Terms at the end of this document.

5.2 Content Responsibility

1. You are responsible for the Knowledge Base content you upload to Yio and for all consequences arising from it.
2. You warrant that the content you upload does not infringe the intellectual property rights or other lawful rights and interests of any third party; if a dispute arises from content you upload, you will handle it on your own and bear the corresponding liability.
3. We do not conduct any substantive review of, or provide any guarantee as to, the legality, accuracy, authenticity, or suitability of Knowledge Base content.

5.3 Our Content Management Measures

As required by applicable laws and regulations, with respect to conduct that uses the Service to engage in unlawful activities or to generate or disseminate unlawful or harmful information, we have the right, in accordance with the law and these Terms, to take measures such as warning, restricting features, and suspending or terminating the Service; to retain relevant records; and, where required by law, to report to the relevant competent authorities.

6. Data Ownership and Intellectual Property

6.1 Your Data Belongs to You

Ownership of the business data you upload—such as Knowledge Base content, conversation records, and customer data—belongs to you. We do not use your data to train our own models, nor do we provide your data to other Users. To the extent necessary to provide the Service to you, we process the foregoing data within the scope of your authorization (for processing involving personal information / personal data, see the Privacy Policy).

6.2 Entrusted Processing (Processor—Entrusted Party)

With respect to the Knowledge Base content uploaded by an Enterprise User and the personal information (personal data) contained in End Visitor leads, the Enterprise User is the processor (referred to as the "controller" under the applicable laws of the European Economic Area / United Kingdom), and Yio is the entrusted party (referred to as the "processor" under the applicable laws of the European Economic Area / United Kingdom). The purposes, duration, and means of processing, the categories of personal information (personal data), the protective measures, and the respective rights and responsibilities of the parties are governed by the Data Processing Agreement (DPA) entered into between them. For personal information (personal data) the purposes and means of processing of which Yio itself determines, such as account registration information, Yio is the processor (controller). The specific legal bases are further set out in the Region-Specific Terms at the end of this document and in the Privacy Policy.

6.3 Yio's Intellectual Property

1. The intellectual property in the Yio product's software, interface design, brand identifiers, documentation, and the like belongs to Shanghai Jiusi Xinyuan Intelligent Technology Co., Ltd.
2. These Terms do not grant you any license to use Yio's intellectual property, except as necessary for normal use of the Service.
3. Without our written consent, you may not use Yio's trademarks, logos, brand elements, or the like.

7. Special Notes on AI Services

7.1 AI-Generated Content

1. The responses generated by the AI assistant based on your Knowledge Base are for use by you and your End Visitors; you bear the corresponding responsibility for your subsequent use of such content.
2. To safeguard Users' right to know and ensure transparency, within the AI assistant's conversation interface we conspicuously label each piece of AI-generated content as "AI-generated" in text. This explicit labeling applies uniformly to all Users. Additional requirements under the laws of particular countries or regions concerning the labeling of generated synthetic content (such as implicit metadata labeling) are set out in the Region-Specific Terms at the end of this document.

7.2 Disclaimer for AI Responses

Important notice: The AI assistant's responses are automatically generated based on Knowledge Base content and may be inaccurate, incomplete, or contain omissions; they do not constitute professional advice in fields such as legal, medical, or financial matters. You should set boundary rules for responses or hand over to human handling in critical scenarios. To the extent permitted by applicable law, we are not liable for losses caused by AI responses; this exclusion does not apply, however, to cases of our intent or gross negligence, or to the infringement of your personal rights and interests.

8. Protection of Personal Information

1. We attach great importance to the protection of personal information (personal data). The specific arrangements and compliance measures regarding the collection, use, storage, sharing, and (where applicable) cross-border transfer of personal information are governed by, and set out in detail in, the Yio Privacy Policy.
2. By using the Service, you are deemed to have read and understood the manner of processing personal information (personal data) described in the Privacy Policy.

9. Service Availability and Technical Support

1. We strive to maintain high availability of the Service, but we do not guarantee uninterrupted or error-free operation.
2. The Service may be temporarily unavailable in the following circumstances, for which we bear no liability for breach:
   • Scheduled system maintenance and upgrades (for which we will use reasonable efforts to provide advance notice).
   • Force majeure events (natural disasters, war, government acts, network outages, power failures, and the like).
   • Failures or service changes of third-party service providers (such as providers of large language models and cloud infrastructure).
   • Adjustments required by changes in laws, regulations, or regulatory requirements.
3. We provide the level of technical support corresponding to the plan you have selected; the specific support methods and response times are subject to the product page or plan description.

10. Service Changes and Termination

10.1 Service Changes

We reserve the right to modify, suspend, or terminate the Service (or any part of it) in accordance with the law. If a change has a material adverse effect on a service you have paid for, we will notify you in advance by reasonable means, and you have the right to request a pro-rata refund for the unused portion.

10.2 Termination by You

1. You may stop using, cancel your subscription, or close your account at any time.
2. After your account is closed, your account data will be permanently and irrecoverably deleted immediately; please export any data you wish to retain before account closure. The product's back office can export conversation records and lead information as CSV; please retain the original Knowledge Base files locally on your own (the system does not provide export of Knowledge Base files).
3. Where self-service account closure is not yet supported for your account within the product, you may contact hello [at] yio.chat or privacy [at] yio.chat, and we will delete your account and the corresponding data after verifying your identity.

10.3 Our Right to Terminate the Service

1. If you breach these Terms, we have the right to require you to remedy the breach within a specified period.
2. If you fail to remedy the breach within a reasonable period after receiving a remediation notice, or if the violation is serious, we have the right to suspend or terminate the provision of the Service to you.
3. If your violation causes losses to us or to third parties, you shall bear the corresponding liability for compensation in accordance with the law.

11. Disclaimers and Limitation of Liability

11.1 Service Provided "As Is"

To the maximum extent permitted by applicable law, the Service is provided on an "as is" and "as available" basis. We make no express or implied warranty that the Service will be continuous, timely, secure, or accurate, or that it will fully meet your particular requirements or be free from any errors or defects.

11.2 Limitation of Liability

1. To the maximum extent permitted by applicable law, we are not liable for any indirect, incidental, special, or consequential damages arising from the use of or inability to use the Service; our aggregate liability to you in respect of the Service shall not exceed the fees you actually paid for the Service in the 12 months preceding the event giving rise to the liability.
2. The foregoing disclaimers and limitations of liability do not apply to losses caused by our intent or gross negligence, nor to the infringement of your personal rights and interests, and do not affect any statutory liability that cannot be excluded or limited by agreement.

11.3 Third-Party Services

The Service relies on third-party services such as large language models and cloud infrastructure. For losses caused by failures of third-party services, we will use reasonable efforts to assist within a reasonable scope, but we bear no liability beyond our reasonable control.

12. Confidentiality

1. Each party shall keep confidential the trade secrets and confidential information of the other party that it learns in the course of the Service, and this obligation shall continue to be effective after the Service terminates.
2. The following information does not constitute confidential information: information already known to the public at the time of disclosure; information that the receiving party can prove it had lawfully learned through legitimate means before disclosure; and information lawfully obtained by the receiving party from a third party with no confidentiality obligation.

13. Changes to These Terms

1. We may revise these Terms from time to time; the revised Terms will be published on this page or within the product, with the "Date of Publication" and "Effective Date" updated.
2. If a revision has a material impact on your rights and interests, we will inform you in advance by means such as in-product notification or email.
3. After the revision takes effect, your continued use of the Service is deemed acceptance of the revised Terms; if you do not agree, you may stop using the Service and close your account.

14. Notices and Service of Notices

1. We may send notices to you by means of in-product notification, the email address you provided at registration, or other reasonable means.
2. Such notices are deemed served on the date they are sent.

15. Governing Law and Dispute Resolution (General Provisions)

1. Except as otherwise provided in the Region-Specific Terms at the end of this document, the formation, validity, interpretation, performance, and dispute resolution of these Terms are governed by the laws of the People's Republic of China (for the purposes of these Terms, excluding the laws of the Hong Kong Special Administrative Region, the Macao Special Administrative Region, and the Taiwan region).
2. If the mandatory laws of your country or region (such as provisions on consumer protection and data protection that cannot be excluded by agreement) provide you with greater protection, such protection is not affected by these Terms; to the extent such mandatory provisions conflict with these Terms, the mandatory provisions shall prevail, and the remaining parts of these Terms shall continue to be effective. The specific dispute resolution arrangements for each applicable region are set out in the Region-Specific Terms at the end of this document.
3. Any dispute arising from or in connection with these Terms shall first be resolved through friendly negotiation between the parties.
4. If negotiation fails, either party has the right to bring a lawsuit before a competent people's court at our place of domicile; however, the foregoing does not exclude a consumer's right under the law to bring a lawsuit before a competent court at the consumer's place of domicile, place of habitual residence, or place of performance of the contract (or another court having jurisdiction under the laws applicable to the consumer).

16. Miscellaneous

1. Entire Agreement: These Terms (including the Privacy Policy and related business rules) constitute the entire agreement between you and us regarding the use of the Service.
2. Severability: If any provision of these Terms is found by a competent authority to be invalid or unenforceable, that provision shall be modified or deleted to the minimum extent necessary, and the remaining provisions shall continue to be effective.
3. Waiver: Our failure to exercise, or delay in exercising, any right under these Terms does not constitute a waiver of that right.
4. Restriction on Assignment: Without our written consent, you may not assign your rights and obligations under these Terms to a third party.
5. Headings: The headings in these Terms are for ease of reference only and do not affect the interpretation of the provisions.

17. Contact Us

If you have any questions about these Terms of Service, please contact us by the following means:

• Email: hello [at] yio.chat
• Website: yio.chat

Ordinarily, we will respond to your request within 15 business days.

Region-Specific Terms

The following terms apply only to Users in the corresponding countries or regions, supplementing and (to the extent of any conflict) prevailing over the main body of these Terms. Concepts already covered in the main body are not repeated; the following sets out only regional differences.

A. Region-Specific Terms for Mainland China Users

If you use the Service in Mainland China, or process personal information located within Mainland China through the Service, then in addition to the main body of these Terms, the following terms apply to you.

A.1 Compliance Obligations

You shall comply with the relevant laws and regulations of the People's Republic of China, including but not limited to the Cybersecurity Law, the Data Security Law, the Personal Information Protection Law, the Interim Measures for the Administration of Generative Artificial Intelligence Services, and the Provisions on the Administration of Deep Synthesis of Internet Information Services. The prohibited acts listed in Section 5 likewise apply in Mainland China and are interpreted in accordance with the foregoing laws.

A.2 Labeling of AI-Generated Synthetic Content

For services provided within the territory of China, in addition to the explicit "AI-generated" text label that applies uniformly to all Users as described in Section 7.1, we will, as required by the Provisions on the Administration of Deep Synthesis of Internet Information Services and the Measures for the Labeling of Artificial Intelligence-Generated and Synthetic Content (effective September 1, 2025), progressively embed in the metadata of AI-generated content the attribute information of generated synthetic content and the service provider code (implicit labeling).

A.3 Filing and Registration

For services provided to the public within the territory of China, we will, as required by the relevant laws and regulations, distinguish and separately fulfill the following filing/registration obligations; the corresponding filings/registrations will be completed before the service is provided to the public, and the true filing numbers will be disclosed on the relevant pages:

• Deep synthesis service filing (Provisions on the Administration of Deep Synthesis of Internet Information Services).
• Filing/registration of large models for generative artificial intelligence services going live (applicable where generative artificial intelligence services are provided to the public).
• Algorithm recommendation service filing (applicable where the Service has public-opinion attributes or social-mobilization capability).

A.4 Cross-Border Provision of Personal Information and Separate Consent

Part of our production environment and object storage is located outside the territory of the People's Republic of China, and the provision of personal information to overseas recipients constitutes the cross-border provision of personal information. With respect to the cross-border provision of personal information and the processing of sensitive personal information, we will, in accordance with Articles 29, 38, and 39 of the Personal Information Protection Law, obtain your separate consent—separate from general consent and unchecked by default—complete a personal information protection impact assessment (PIPIA), and ensure compliance through one of the following: passing a security assessment organized by the national cyberspace authority; obtaining personal information protection certification from a specialized institution; or entering into a contract with the overseas recipient in accordance with the standard contract formulated by the national cyberspace authority and filing it with the provincial cyberspace authority. The specific cross-border scenarios, the list of recipients, and the compliance measures are set out in detail in the Privacy Policy.

A.5 Retention of Network Logs

In accordance with Article 21 of the Cybersecurity Law, we will retain relevant network logs for no less than 6 months.

A.6 Minors

We will not actively collect the personal information of minors under the age of 14. If a minor under the age of 14 uses the Service, the consent of his or her parents or other guardian must be obtained in advance.

A.7 Person in Charge of Personal Information Protection and Complaint Channels

For matters relating to personal information protection, you may contact our person in charge of personal information protection at privacy [at] yio.chat. If you believe that our processing of personal information has harmed your lawful rights and interests, you may file a complaint or report with the Cyberspace Administration of China, the local provincial cyberspace authority, or the local market regulation authority.

A.8 Governing Law and Jurisdiction

For disputes arising from use of the Service in Mainland China, the laws of the People's Republic of China apply (for the purposes of these Terms, excluding the laws of the Hong Kong Special Administrative Region, the Macao Special Administrative Region, and the Taiwan region), and the matters are handled in accordance with Section 15, paragraphs 3 and 4. Disputes relating to personal information and privacy are additionally governed by the corresponding chapter of the Privacy Policy.

B. Region-Specific Terms for Users in the European Economic Area (EEA) and the United Kingdom (UK)

If you are located in the European Economic Area or the United Kingdom, or are protected by the EU General Data Protection Regulation (GDPR) or the UK General Data Protection Regulation (UK GDPR), then in addition to the main body of these Terms, the following terms apply to you; to the extent of any conflict with the main body, the following terms prevail.

B.1 Your Statutory Rights Are Unaffected

These Terms do not affect your statutory rights as a consumer under applicable mandatory law, including but not limited to protections relating to contractual conformity, guarantees, and unfair contract terms. No disclaimer or limitation of liability in these Terms excludes or limits any liability that the law does not permit to be excluded or limited (including liability arising from intent or gross negligence, or from personal injury).

B.2 Statutory Rights of Withdrawal/Refund

If applicable consumer protection law grants you a statutory withdrawal period (cooling-off period) or other statutory refund rights, such rights are not affected by Section 4.4. You may exercise such rights via hello [at] yio.chat.

B.3 Processing and Cross-Border Transfer of Personal Data

We process your personal data in accordance with the GDPR / UK GDPR. The lawful basis for processing (such as consent, necessity for the performance of a contract, or legitimate interests), data subject rights (access, rectification, erasure, restriction of processing, data portability, objection to processing, withdrawal of consent, and the right not to be subject to a decision based solely on automated processing (including profiling) that produces legal or similarly significant effects on you, Article 22 GDPR), and the safeguards adopted for cross-border transfers (Standard Contractual Clauses (SCCs) approved by the European Commission / the competent UK authority, adequacy decisions, or other recognized transfer mechanisms) are all implemented in accordance with the Privacy Policy and applicable law. The AI question-and-answer service described in Section 7.2 ordinarily does not constitute a decision based solely on automated processing within the meaning of Article 22 GDPR; where an Enterprise User uses it for such purposes, the corresponding compliance obligations are borne by that Enterprise User itself.

B.4 Right to Lodge a Complaint with a Supervisory Authority

Without prejudice to any other administrative or judicial remedy, you have the right to lodge a complaint with a data protection supervisory authority in the Member State of your habitual residence, place of work, or place of the alleged infringement; if you are in the United Kingdom, you may lodge a complaint with the Information Commissioner's Office (ICO). You may also contact us first via privacy [at] yio.chat.

B.5 Age of Children

In the European Economic Area, the minimum age for providing information society services to a child on the basis of consent is 16; Member State law may lower this age to no less than 13. Below the applicable age, the consent or authorization of the child's parent or guardian is required. The Service is primarily intended for enterprise and business users.

B.6 EU/UK Representative

If applicable law requires us to designate an EU representative (Article 27 GDPR) or a UK representative, we will designate one in accordance with the law and publish the representative's contact details in these Terms or the Privacy Policy. Until then, and as a general matter, you may contact us regarding matters relating to personal data via privacy [at] yio.chat.

B.7 Mandatory Law and Dispute Resolution

These Terms do not deprive you of the protection you enjoy under the mandatory law of your place of habitual residence, nor of your right to bring a lawsuit before a competent court at your place of domicile. To the extent such mandatory provisions conflict with Section 15, the mandatory provisions shall prevail in respect of EEA/UK Users.