Last Updated: November 14, 2025

Yanxin Engineering Co., Ltd. (hereinafter referred to as "we") fully recognizes the importance of your personal information and is committed to protecting its security and reliability. We strive to maintain your trust by adhering to the following principles in safeguarding your personal information: the principle of consistent responsibility and rights, purpose specification, explicit consent, data minimization, security assurance, subject participation, and transparency. We further commit to adopting appropriate security measures in line with industry standards to protect your personal information. Therefore, we encourage you to read this Policy carefully, ensure you fully understand it, and make an informed and explicit expression of your genuine consent.

Before using our products (or services), please read this Policy thoroughly and understand it completely. You may then choose whether to agree to its terms. If you explicitly indicate that you do not agree with this Policy, we will not process your personal information (including collection and storage) in accordance with this Policy. Please note, however, that this may affect your normal use of our products and/or services. Your use or continued use of our products and/or services, or your selection of "I have read and agree" after we update this Privacy Policy (we will notify you of any updates), signifies your acceptance of this Privacy Policy and any revised versions, and your authorization for us to collect, process, and protect your information in accordance with this Policy. Key clauses that may significantly impact your rights and interests are highlighted in bold for your special attention.

Unless otherwise specified, the terms used in this Privacy Policy are defined as follows:

1. Personal Information (as defined in GB/T 35273-2020 Information Security Technology - Personal Information Security Specifications): Refers to various information recorded electronically or by other means that can identify a specific natural person alone or in combination with other information, or reflect the activities of a specific natural person. Personal information under this Policy includes basic personal details (name, date of birth, gender, address, personal phone number, email address), personal identity information (ID card numbers), personal biometric information (fingerprints, facial features), online identity identification information (system accounts, IP addresses, personal digital certificates, etc.), personal property information (bank account numbers, passwords, transaction and consumption records, virtual currency, virtual transactions, redemption codes, and other virtual property information), contact lists, personal browsing history (website browsing records, software usage records, list of installed applications), personal device information (hardware serial numbers, hardware models, device MAC addresses, operating system types, application lists, unique device identifiers), and personal location information (approximate location, precise location data). The specific types of personal information we collect are described in the relevant sections below.

2. Sensitive Personal Information (as defined in GB/T 35273-2020 Information Security Technology - Personal Information Security Specifications): Refers to personal information that, if leaked, illegally provided, or abused, may endanger personal or property safety, or easily cause harm to personal reputation, physical or mental health, or result in discriminatory treatment. Sensitive personal information under this Policy includes your personal property information, personal identity information, personal biometric information, online identity identification information, contact lists, precise location information, and shipping addresses. The specific types of sensitive personal information we collect are described in the relevant sections below.

3. Device: Refers to any equipment used to access our products and/or services, such as desktop computers, laptops, tablets, or smartphones.

4. Unique Device Identifier (Unique ID or UUID): A string of characters embedded in a device by the manufacturer, which can be used to uniquely identify that device (e.g., IMEI, Android ID, IDFA, OpenUDID, GUID, SIM card IMSI information). Unique device identifiers serve various purposes, including delivering advertisements when cookies cannot be used (e.g., in mobile applications).

5. IP Address: Every device connected to the Internet is assigned a number known as an Internet Protocol (IP) address. These numbers are usually assigned based on geographic regions. IP addresses can often be used to identify the location from which a device is connecting to the Internet.

6. SSL: Secure Sockets Layer (SSL) is a security protocol implemented on top of the transmission control protocol/Internet protocol (TCP/IP). SSL supports various types of networks and provides three basic security services, primarily using public-key and symmetric-key cryptography for confidentiality.

7. Cookie: A small file containing a string of characters that is sent to and stored on your computer, mobile device, or other equipment when you log in to or use websites or other online content (usually encrypted). Similar technologies include other technologies that can be used for similar purposes as cookies, such as web beacons, proxies, and embedded scripts.

8. Account: When you register an account and provide us with certain personal information, you can use our services more effectively. When you access [Platform Name, e.g., the CMS], the system uses this account information to authenticate your identity and prevent unauthorized access to your account.

9. Anonymization: The technical process of processing personal information so that the personal information subject cannot be identified or associated, and the processed information cannot be restored.

10. De-identification: The technical process of processing personal information so that it cannot identify or associate with a personal information subject without referring to additional information.

11. Server Logs: Typically, our servers automatically record the page requests you make when visiting our website. These "server logs" usually include your web request, Internet Protocol address, browser type, browser language, the date and time of your request, and one or more cookies that may uniquely identify your browser.

This Privacy Policy is designed to help you understand how we collect, process, and protect your information, and how you can query, access, correct, delete, withdraw consent for your personal information, and deactivate your account.