Privacy Policy

Last updated: October 17, 2026

This policy explains what personal data Shanghai Tandiu Intelligent Technology Co., Ltd. collects through www.tandiu.cn and TANDIU Pro.

What we collect

• Website and API requests: IP address, user agent, requested URL, referrer and time, used for security, rate limiting and aggregate traffic statistics.
• Pro customers: Paddle shares your customer ID, subscription ID and transaction details with us. Your name, email, address and payment details are collected and processed by Paddle as Merchant of Record; card details never reach us. We fetch your email address from Paddle to send your API key link and service messages about your subscription; we do not keep it in our subscription records.
• API keys: stored only as a one-way hash, linked to your subscription ID, with usage counts.
• Emails you send us.

How we use it

To run and secure the Service, deliver Pro and API keys, handle billing questions and refunds, and comply with law. We do not sell personal data and do not use advertising trackers.

Sharing

Paddle (payments, tax, invoicing), Tencent Exmail (sends our service emails; your email address and the message are processed in China), our hosting providers, and authorities where required by law.

Retention

Request logs are kept for up to 12 months. Subscription records are kept while the subscription is active and afterwards as required for tax and accounting. Copies of service emails may stay in our mailbox for support and records.

Cookies

The site does not set advertising cookies. Paddle's checkout may set cookies needed to process payment.

Your rights

Ask for access, correction or deletion of your data by emailing contact@tandiu.cn; we reply within 30 days. Requests about payment data can also go to Paddle.

Controller

Shanghai Tandiu Intelligent Technology Co., Ltd., Shanghai, China. contact@tandiu.cn