1.1 Yafi is an application that integrates piano simulation, social games, and real-time voice communication. You can use the piano simulator to switch sheet music, enter voice rooms to interact with multiple users in real-time, play social games, and communicate with other users through the private chat function. 1.2 This application is a personal development project. Developer information is as follows: * Application Name: Yafi * Contact Information: Phone: 13422248139; Email: support@yafi.cc 1.3 This application currently does not contain any in-app purchases. The developer reserves the right to adjust the service model (including but not limited to introducing advertising or value-added services) in the future, provided that it does not violate platform regulations and this agreement. Users will be notified of any changes in advance.

2.1 You may need to register an account to use some features of this Application. You agree to provide true, accurate, complete, and current registration information and to promptly update it as necessary. 2.2 You are responsible for maintaining the security of your account and for all activities that occur under your account. You must immediately notify the Developer upon becoming aware of any unauthorized use of your account. 2.3 The Developer reserves the right, at its sole discretion, to restrict, suspend, or terminate the service for any user account that violates applicable laws, regulations, or the terms of this Agreement, without any liability to the Developer.

3.1 Compliance with Laws: You agree that your use of this service complies with all applicable national/regional laws, regulations, rules, and normative documents. 3.2 Content Responsibility: * You are solely responsible for any content generated during your use of this application through voice, text, game operations, etc. (“User Content”). * User-Uploaded Content: Any files, recordings, or data you upload to this application (“Uploaded Content”) must be created by you or have been fully and legally authorized. You guarantee that Uploaded Content does not contain any of the following information: * (a) Violating the basic principles established by the Constitution or laws and regulations; * (b) Endangering national security, leaking state secrets, subverting state power, or undermining national unity; * (c) Damaging national honor and interests; * (d) Inciting ethnic hatred or discrimination, or undermining national unity; * (e) Violating national religious policies, or promoting cults and feudal superstitions; * (f) Spreading rumors, disrupting social order, or undermining social stability; * (g) * Disseminating obscene, pornographic, gambling, violent, murderous, terrorist, or crime-inciting content; * (h) Insulting or defaming others, infringing upon others' legitimate rights (such as portrait rights, privacy rights, intellectual property rights, etc.); * (i) Containing other content prohibited by laws and administrative regulations. 3.3 Intellectual Property: * The intellectual property rights of this application itself and all its software, designs, trademarks, logos, and other content belong to the developer. * You retain the original intellectual property rights to uploaded content. However, you grant the developer a worldwide, royalty-free, non-exclusive license to use, copy, store, transmit, and modify your uploaded content for the purpose of providing services to you (such as storage, analysis, and display) and improving algorithms. 3.4 Prohibited Activities: You shall not engage in any behavior that interferes with or disrupts the services of this application or related servers and networks, nor attempt to access any system or data of this application without authorization.

The protection of your personal information is of utmost importance. We have formulated the "Yafi Privacy Policy," which details how we collect, use, store, share, and protect your information. This policy is an integral part of this Agreement, and we urge you to read it carefully.

5.1 "As Is" Basis: The services of this App are provided on an "as is" and "as available" basis. The Developer makes no warranties, express or implied, regarding the suitability, continuity, timeliness, security, or accuracy of the services. 5.2 Technical Risks: The Developer shall not be held liable for any service interruptions, data loss, or other damages caused by force majeure or reasons beyond the Developer's reasonable control, including but not limited to network conditions, communication lines, third-party services, or device failures. 5.3 Third-Party Content: Within social interaction or content display areas, you may encounter content provided by other users. Such content is the sole responsibility of the user providing it. The Developer does not review its correctness or legality and assumes no responsibility for it. If you discover infringing or violating content, please report it to us via the contact information provided.

To the maximum extent permitted by law, the Developer and its affiliates shall not be liable for any indirect, incidental, special, consequential, or punitive damages (including but not limited to loss of profits, data loss, or damage to goodwill) arising from your use of or inability to use the App, even if the Developer has been advised of the possibility of such damages.

7.1 The developer reserves the right to modify the terms of this agreement at any time. The modified agreement will be published within the application or notified to you through other appropriate means. If you do not agree to the modifications, you should stop using the application; continued use will be considered acceptance of the modifications. 7.2 Either you or the developer may terminate your use of this application at any time. Upon termination of this agreement, your right to use this application will immediately cease.

8.1 This Agreement shall be governed by and construed in accordance with the laws of the place where it is located. 8.2 Any dispute arising out of or relating to this Agreement shall first be settled amicably through negotiation between the parties. If such negotiation fails, either party shall have the right to submit the dispute to a people's court with competent jurisdiction in the defendant's place of residence for resolution.

9.1 This Agreement constitutes the entire agreement between you and the Developer regarding your use of this Application. 9.2 If any provision of this Agreement is held to be invalid or unenforceable, that provision shall be modified to the minimum extent permitted to make it valid and enforceable without affecting the validity of the remaining provisions. 9.3 The Developer's failure to exercise or enforce any right or provision of this Agreement shall not constitute a waiver of such right or provision.