Ketang Kids Privacy Policy

This policy explains what information [Company name] ("we") collects when providing Ketang Kids, how we use it, how long we keep it, and who can see it. For student information, see also our Children's Data Notice.

1. Information we collect

• Centers and accounts: center names, license and payment records; names, usernames, securely hashed passwords, sign-in times and interface language of center admins and teachers. To keep each account signed in on one device at a time, we record the browser session used to sign in.
• Teaching content: textbook files the center imports, the words, sentences and pictures confirmed when preparing units, and the audio we generate.
• Classes and lesson records: classes, lead teachers and assistants, and the time, activity, unit and teacher of each lesson.
• Student lists: student names, parent names and contact details (Telegram or phone), the options parents agreed to, and notes, all entered by the center (see the Children's Data Notice).
• Classroom devices: device names, the class they belong to, pairing time and last time online.
• Messages and appeals: messages centers send through "Help & support" and our replies.
• Demo page: name, phone or Telegram, center name, message, language and IP address that visitors choose to leave (see the Demo Page Notice).
• Security records: the operation log of platform staff accounts and new-device sign-in alerts; when, which version and from which IP address a center admin agreed to this policy and the Terms of Service.

2. How we use it

• To provide and maintain the service: sign-in, teaching, offline downloads, slots and licenses.
• To contact centers: renewals, slot requests, and replies to appeals and messages.
• To keep the service secure: stopping stolen or lent accounts, and investigating problems.
• We do not sell this information, and we never use student information for advertising.

3. Who can see it

• Within the center: center admins can see all of their center's data; teachers can see the classes and students they teach.
• Platform staff: our admins and assistants can see center information to provide the service, handle appeals and process payments. Their actions are recorded in the operation log.
• Service providers: we use these providers to run the service and share only what each needs:
• Cloud server (Alibaba Cloud, Singapore): hosts the website and data;
• Speech synthesis (such as Microsoft Azure Speech): receives only the text of words and sentences to generate audio, never student information;
• Telegram: delivers demo leads, new support messages, security alerts and encrypted backups to platform staff.
• We disclose information when the law requires it.

4. How long we keep it

• Operation log of platform staff: 30 days.
• A center's accounts, textbooks, classes, students and lesson records: for as long as the service continues; deleted 90 days after the service ends, unless the law requires us to keep them.
• Contact details left on the demo page: up to 2 years, or until you ask us to delete them.
• Backups: encrypted daily; older backups are deleted on a rolling basis.

5. Security

• Passwords are stored hashed; the website uses HTTPS; backups are encrypted before they are sent or stored.
• Each center's data is kept separate. Files and audio can only be fetched by that center's signed-in accounts or paired devices (except content published on the demo page).

6. Your rights

• Centers can view, edit or delete teachers, classes, students and other information in the console at any time.
• To export or delete data, or for any other question, contact [Contact email].

7. Updates

• When this policy changes, its version number changes, and center admins must read and agree again the next time they sign in.
• This policy exists in Chinese and English. If they differ, the Chinese version prevails.

Version: 2026-11-09