Effective date: September 29, 2026 | Last updated: September 29, 2026
This Privacy Policy explains how Yiyang Shuimu Yidao Culture Communication Co., Ltd. ("we", "us", "our") collects, uses, shares, and protects your information when you use the game Echess (the "Service") on our website, on desktop, or on mobile devices.
By using the Service you acknowledge that you have read and understood this Privacy Policy. If you do not agree with it, please do not use the Service.
The data controller responsible for your personal data is:
We collect only what is necessary to run the Service. We do not collect your real name, postal address, government ID, or precise location, and we do not use advertising or tracking SDKs.
| Category | What we collect | Why |
|---|---|---|
| Account data | Username, nickname, password (stored only as a salted hash — we never store plaintext passwords), account ID, account creation date, VIP status. | To create and secure your account and sign you in. |
| Gameplay data | Match history, move records, scores, Elo rating, coins balance, win/loss statistics, endgame puzzles and board layouts you create, club membership, in-game chat messages sent inside matches, and friend/follow relationships. | To provide matchmaking, leaderboards, replays, clubs, and social features, and to detect cheating. |
| Technical & security data | IP address, device and browser type, operating system, app version, session tokens, and connection timestamps. | To maintain your session, prevent abuse and cheating, and keep the Service stable. |
| Optional profile data | Country/region selection, avatar image, and language preference. | Only if you choose to provide it, to display your public profile. |
| Purchase data | A record that a purchase was made, the product ID, the order/transaction ID, the amount and currency, and the purchase status. | To deliver the virtual coins or VIP benefits you bought and to handle refunds or disputes. |
Where the GDPR or UK GDPR applies, we process your data on these bases:
We do not sell, rent, or trade your personal data. We share it only in these limited situations:
We do not use advertising networks, and we do not share data with data brokers or ad-tech companies.
Our servers are located in mainland China. If you use the Service from outside China, your data will be transferred to and processed in China. Where required, we rely on appropriate safeguards — such as the standard contractual clauses approved by the European Commission — for such transfers. By using the Service you consent to this transfer, storage, and processing.
We keep your account and gameplay data for as long as your account is active. If you delete your account, we remove your personal data as described in Section 8. We may retain a limited amount of information where the law requires it — for example, purchase and tax records, or records needed to resolve an ongoing dispute or prevent fraud — and we keep anonymised, aggregated statistics that can no longer identify you.
Depending on where you live, you may have the right to:
You can request deletion of your account and associated personal data at any time. Two ways:
You may also email tdedao@qq.com from any address with your username and request deletion. We will confirm and complete your request within 30 days. For details about what is deleted and what is retained, see the Account & Data Deletion page.
We may decline or delay a request if we are legally required to retain the data, if the request would affect another person's privacy, or if it would prevent us from investigating fraud or abuse.
The Service is not directed at children under 13 (or under 16 in the EEA/UK), and we do not knowingly collect personal data from them. If you are a parent or guardian and believe your child has provided us with personal data, please contact us at tdedao@qq.com and we will delete it promptly. Accounts found to belong to an underage user will be removed.
We do not use advertising or third-party tracking cookies. We use your browser's or app's local storage only for things that make the Service work:
You can clear this at any time through your browser or device settings. Clearing it will sign you out and reset your local preferences. The Service does not work without the session token, so it cannot be disabled separately.
We protect your data with measures including hashed passwords, encrypted HTTPS/TLS connections in transit, access controls on our servers, and rate limiting against abuse. No method of transmission or storage is completely secure, so we cannot guarantee absolute security — but we work to keep your data safe and will notify you and the relevant authorities as required if a breach affecting your personal data occurs.
We may update this Privacy Policy from time to time — for example, if we add a new feature or a new payment channel. When we do, we will revise the "Last updated" date at the top and, for material changes, notify you in the app or on this page before the change takes effect. Continuing to use the Service after an update means you accept the revised policy.
For any question, request, or complaint about this Privacy Policy or your personal data: