Last Updated: 21 January 2026
I. General Provisions
1.1 Effectiveness and Acceptance of Terms
These Terms of Use (hereinafter referred to as the “Terms”) together with the attached Privacy Policy and Cookie Usage Rules constitute the complete and exclusive agreement between you (hereinafter referred to as the “User”) and the website operator (an individual, collectively referred to as “we”) regarding the use of the services provided by this website. Your access to, browsing of this website, or use of any content and services provided by this website shall be deemed as your full reading, understanding, and unconditional acceptance of all provisions of these Terms and all attachments. If you do not agree to any provision of these Terms, you shall immediately cease accessing and using this website.
1.2 Scope and Nature of Services
•This website is a purely knowledge-display web-based platform without any registration or login functions. It only provides users with free knowledge sharing services (excluding interactive functions such as online tests and AI-assisted calculations) and does not involve profit-making activities such as educational services, medical diagnosis and treatment, or commercial product sales.
•This website only supports web-based access and does not provide exclusive services for mobile devices, nor does it collect any information related to mobile phones or other devices.
•To maintain the daily operation of the website, we only obtain reasonable revenue by accessing compliant advertising alliances. Advertising placement and revenue-related activities strictly comply with these Terms and the laws and regulations of the regions where the services are provided.
1.3 Compliance Basis
We strictly adhere to the following laws, regulations, and industry standards to ensure the legality and compliance of website operation and service provision throughout the process:
•China: Personal Information Protection Law of the People’s Republic of China, Data Security Law of the People’s Republic of China, Advertising Law of the People’s Republic of China;
•European Union (EU) and European Economic Area (EEA): General Data Protection Regulation (GDPR), ePrivacy Directive;
•United Kingdom (UK): Data Protection Act 2018 (UK GDPR), Privacy and Electronic Communications Regulations (PECR);
•Asia-Pacific Region: Japan’s Act on the Protection of Personal Information, South Korea’s Personal Information Protection Act, Singapore’s Personal Data Protection Act (PDPA), Indonesia’s Personal Data Protection Law (PDP Law);
•Advertising Compliance: Self-regulatory guidelines of international advertising alliances, and relevant regulatory requirements on advertising placement and data use in various regions.
II. User Rights and Obligations
2.1 User Rights
•Have the right to freely access and browse all publicly displayed free knowledge content on this website;
•Have the right to exercise rights related to personal information (such as inquiry, correction, deletion, withdrawal of consent, etc.) in accordance with these Terms and the Privacy Policy;
•Have the right to independently choose whether to click on advertising alliance content and may disable personalized advertising push services in accordance with the methods specified in the Cookie Usage Rules.
2.2 User Obligations
•Undertake to use the services of this website solely for personal non-commercial and non-profit purposes, and shall not use the website content for illegal purposes such as commercial promotion or illegal dissemination;
•Shall not copy, alter, reprint, disseminate, take screenshots, record screens of the website content for secondary distribution, or use it for activities that infringe upon our intellectual property rights or those of third parties;
•Shall not obtain undisclosed content or data of the website through any technical means (including but not limited to crawlers, hacking attacks, reverse engineering, etc.), nor interfere with the normal operation of the website or damage the technical protection measures of the website;
•Shall not use this website to publish or disseminate any illegal, insulting, offensive content that infringes upon others’ privacy or legitimate rights and interests, nor use the website content for activities that violate the laws and regulations of the region where the User is located;
•If communicating with us via email, shall provide true and accurate email information and feedback content, and shall not provide false information or usurp others’ identity information.
III. Specifications for the Use of Knowledge Content
•All free knowledge content provided by this website is shared for personal scientific research hobbies, only for popular science exchanges, and does not constitute legally binding advice in any form such as medical, academic, or professional consultation;
•The User shall bear full responsibility for any decisions and actions made based on the website content. We do not make any express or implied warranties regarding the accuracy, completeness, or applicability of the content;
•The intellectual property rights of the website content belong to us (except for content authorized by third parties). Users may only browse and learn for personal purposes, and shall not use it for commercial purposes or illegal dissemination. If quotation is required, the source shall be indicated and our written permission shall be obtained.
IV. Rules Relating to Advertising Alliance Services
4.1 Description of Advertising Display and Revenue
•The advertising content displayed on the website is provided by compliant advertising alliances. Advertising placement is based on non-identifiable behavioral data of users (such as browsing preferences, country/region of residence), which is only used to achieve precise advertising display and effect statistics and ensure the operational revenue of the website;
•The selection and cooperation of advertising alliances comply with the advertising compliance requirements of the regions where the services are provided. We only provide advertising display portals and do not participate in the production, review, or subsequent transaction links of advertising content.
4.2 User Rights and Responsibilities Relating to Advertising
•Users have the right to independently choose whether to click on advertisements or accept personalized advertising pushes. They may manage advertising-related Cookie settings in accordance with the methods specified in the Cookie Usage Rules. Disabling non-essential advertising Cookies will not affect the use of core website functions;
•Any transactions or interactive behaviors generated by users jumping to third-party platforms after clicking on advertisements shall be agreed upon independently by users and third-party advertisers. We shall not be liable for any related responsibilities, nor shall we be responsible for the authenticity, legality, or security of the advertising content;
•Users are prohibited from interfering with advertising statistical effects through illegal means such as malicious clicks or bulk clicks. If such behaviors are found, we have the right to take measures such as restricting access, and will pursue relevant legal responsibilities for serious circumstances;
•Users are prohibited from accessing advertisements in bulk through the same IP or network environment, using scripts or simulators to click on advertisements, or engaging in behaviors that interfere with the risk control of advertising alliances such as abnormal fluctuations in daily active data or high-frequency clicks by fixed users. Such behaviors are deemed serious violations, and we have the right to restrict their access rights and notify the advertising alliance.
V. Intellectual Property Statement
5.1 Our Intellectual Property Rights
•The overall architecture, page design, technical implementation, content layout, and knowledge content (except for content authorized by third parties) of this website are the intellectual property of us and are protected by relevant laws and regulations such as copyright law and patent law;
•Without our prior written permission, no unit or individual shall arbitrarily use, copy, modify, disseminate, display, or adapt any content related to the intellectual property rights of the website for commercial purposes.
5.2 Third-Party Intellectual Property Rights
•The intellectual property rights of third-party data, materials, and authorized content cited on the website belong to the original right holders. We have obtained legal authorization or follow the principle of fair use;
•The intellectual property rights of services and content provided by advertising alliances and other third parties belong to the third parties. Users shall comply with the intellectual property-related provisions of third parties, and we shall not bear relevant joint and several liabilities.
5.3 User’s Intellectual Property Responsibilities
•The intellectual property rights of feedback content, consultation information, etc. submitted by users via email belong to the users, but users grant us a free, non-exclusive right to use them for optimizing website services and content quality;
•Users guarantee that the submitted content does not infringe upon the intellectual property rights, privacy rights, reputation rights, or other legitimate rights and interests of any third parties. If disputes arise due to the content submitted by users, the users shall bear full responsibility and compensate us for any losses suffered thereby.
VI. Data Protection and Privacy Policy
6.1 Principles of Data Collection and Processing
•We strictly follow the principles of “legality, legitimacy, necessity, and minimization” and only collect the following two types of information: ① Necessary communication information such as name, contact email, feedback content, and country of residence actively provided by users via email; ② Non-identifiable network information (IP address, network operator, country/region of residence) and usage behavior information (visited pages, stay time, click records, etc.) automatically collected through Cookies and similar technologies. For specific rules, please refer to the Cookie Usage Rules;
•We do not collect sensitive or irrelevant information such as mobile phone numbers, ID card numbers, biometric information, or device information. The legal bases for data processing include users’ express consent, the necessary needs of providing services, the protection of legitimate interests, and mandatory obligations under laws and regulations.
6.2 Data Storage and Security
•Users’ personal information is stored on compliant third-party cloud servers. Data security is guaranteed through technical measures such as HTTPS encrypted transmission and encrypted storage on cloud servers. There is no cross-border data transmission, and the storage behavior complies with the data protection requirements of the regions where the services are provided;
•Only the website operator himself/herself can access users’ personal information. Access rights are strictly restricted, and a data backup mechanism is established to prevent data loss or leakage;
•In the event of a data security incident, we will promptly initiate an emergency response in accordance with the Privacy Policy, notify users, and take remedial measures.
6.3 User Data Rights
Users have the right to inquire about, copy, correct, and delete their personal information, and to withdraw consent to the use of Cookies and advertising pushes. For specific exercise methods and procedures, please refer to the Privacy Policy.
VII. Cookie Usage Rules
•The Cookies used by the website are divided into necessary Cookies (to ensure the operation of basic functions), analytical Cookies (to optimize service experience), and advertising Cookies (to realize advertising placement and effect statistics). Necessary Cookies do not require users’ consent, while non-necessary Cookies (analytical and advertising types) require users’ explicit consent by checking;
•When users visit the website for the first time, a pop-up window will inform them of the type, purpose, and scope of use of Cookies. Users can independently choose whether to enable non-necessary Cookies and may modify Cookie preferences at any time through browser settings or advertising alliance channels. For specific rules, please refer to the attached Cookie Usage Rules.
VIII. Special Protection for Children’s Privacy
•We do not actively collect personal information of minors under the age of 16 (EU/UK standard) or under the age of 14 (China and some Asia-Pacific countries/regions standard). Minors may use this website only under the accompaniment of their legal guardians, and only guardians may provide their own email and other information for necessary communication;
•If it is found that minors’ personal information has been collected by mistake, we will delete all such information within 72 hours after verification, notify the guardian via the reserved email, and stop providing relevant services;
•Guardians may apply to inquire about or delete minors’ personal information through the agreed contact methods. We will feedback the result within 10 working days and may require guardians to provide identification materials if necessary (only for identity verification, which will be deleted immediately after verification).
VIII. Special Protection for Children’s Privacy
•We do not actively collect personal information of minors under the age of 16 (EU/UK standard) or under the age of 14 (China and some Asia-Pacific countries/regions standard). Minors may use this website only under the accompaniment of their legal guardians, and only guardians may provide their own email and other information for necessary communication;
•If it is found that minors’ personal information has been collected by mistake, we will delete all such information within 72 hours after verification, notify the guardian via the reserved email, and stop providing relevant services;
•Guardians may apply to inquire about or delete minors’ personal information through the agreed contact methods. We will feedback the result within 10 working days and may require guardians to provide identification materials if necessary (only for identity verification, which will be deleted immediately after verification).
IX. Disclaimer
9.1 Disclaimer for Services and Content
•The services of this website are provided “as is”. We do not make any express or implied warranties, including but not limited to warranties regarding the timeliness, stability, or completeness of the services;
•The knowledge content of the website is only shared for personal scientific research hobbies and does not guarantee accuracy or applicability. We shall not be liable for any losses incurred by users based on such content;
•We shall not be liable for service abnormalities, data loss, or personal information leakage caused by uncontrollable factors such as force majeure, network failures, third-party service interruptions, hacking attacks, or user operation errors, but will take remedial measures within our capabilities.
9.2 Disclaimer for Third Parties
•We shall not be liable for the service quality or compliance of third parties such as advertising alliances and cloud service providers. Third parties’ behaviors shall comply with their own rules and privacy policies;
•Third-party links contained on the website are only for the convenience of users’ access. We shall not be liable for the content, privacy policies, or service quality of third-party websites. Users shall bear their own risks when accessing third-party links.
X. Modification and Update of Terms
•We may revise these Terms in accordance with updates to laws and regulations, adjustments to service content, etc. After revision, the updated text will be posted at the bottom of the homepage of the website, clearly marked with the “Last Updated Date”, and historical versions will be retained for at least 1 year for inspection;
•If the Terms involve material changes (such as adjustments to the scope of information collection, modifications to advertising cooperation rules, changes to the method of exercising rights, etc.), users will be notified via the reserved email or website pop-up window, with a consideration period of at least 30 days. Users’ continued use of the website services shall be deemed as acceptance of the revised Terms;
•The update of the Terms shall not have retrospective effect. For user behaviors before the revision, the Terms prior to the change shall still apply (unless otherwise specified by laws and regulations).
XI. Termination of Services
•We have the right to terminate the provision of services to users in the following circumstances: users violate these Terms, legal and regulatory requirements, or services can no longer be provided, etc. Users will be notified via email before termination (unless otherwise specified by law);
•Users may terminate the use of services at any time by ceasing to access this website. If users initiate a request to delete personal information, we will delete or anonymize the users’ personal information within 15 working days after completing identity verification (except as required by laws and regulations to retain);
•After the termination of services, the provisions of these Terms that are of a continuing nature, such as those relating to intellectual property rights, disclaimers, and dispute resolution, shall remain valid.
XII. Dispute Resolution and Applicable Law
12.1 Applicable Law
The interpretation of these Terms and the resolution of disputes shall be governed by Chinese law, while also following the provisions of the EU GDPR, UK GDPR, and relevant laws and regulations of the user’s region that are more favorable to the user’s rights and interests.
12.2 Dispute Resolution
Any disputes arising from these Terms shall first be resolved through friendly negotiation; if negotiation fails, users may choose to file a lawsuit with a competent people’s court in China, or select a local dispute resolution mechanism in accordance with the laws and regulations of their region (such as alternative dispute resolution institutions in the EU, complaint channels of the UK Information Commissioner’s Office (ICO)). The relevant costs arising from litigation or dispute resolution shall be borne by the losing party.
XIII. Contact Information and Complaints/Reports
If you have any questions about these Terms, need to exercise your personal information rights, complain about or report illegal behaviors, or seek legal remedies, you may contact us through the following methods. We will respond and handle the matter properly within 15 working days:
•Official Email: [email protected] (priority handling channel; all communications and handling results will be fed back through this email)
XIV. Supplementary Provisions
1.If any provision of these Terms is deemed invalid or unenforceable, it shall not affect the validity of other provisions, which shall remain in full force and effect;
2.Our failure to exercise or delay in exercising any right under these Terms shall not constitute a waiver of such right;
3.These Terms and their attachments shall take effect from the date of publication. Matters not covered herein shall be handled in strict accordance with relevant laws and regulations;
4.The attached Privacy Policy and Cookie Usage Rules are an integral part of these Terms and have the same legal effect as these Terms. Users’ access to this website shall be deemed as simultaneous acceptance of the content of the attachments. The content of the attachments shall be updated by the operator in accordance with laws and regulations, and the publicity method shall be the same as that of these Terms.
Website Operator (Individual): Kevin
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