Copyright & Terms of Use

Last updated: June 2026

This website (clavissinica.com) and all its content are owned or licensed by Clavis Sinica Limited (registered in New Zealand). Content includes, without limitation: the Three-Script Theory and Visual Key system, character etymology breakdowns, atlases / picture books / flashcards / assessments, illustrations, copy, databases, software and interface design.

1. Ownership

Unless otherwise noted, all original content is copyright of Clavis Sinica Limited and its founder Dr. John Chu, protected under New Zealand and international copyright law.

2. Permitted use

• Purchased digital products (PDF/EPUB/flashcards) are for personal and family learning.
• You may view, print and read purchased products for personal use.

3. Strictly prohibited

Without written authorization from Clavis Sinica Limited, you may NOT:

• Use any content to train AI / machine-learning models, or for data/text mining or scraping.
• Copy, resell, redistribute or publicly disseminate the content or products.
• Use content commercially (institutional/commercial use requires a license — see Enterprise or Institutions).
• Remove or alter copyright marks, Edition IDs or forensic watermarks.
• Reverse-engineer the software, input method or API.

4. Trademarks

"Clavis Sinica", the Visual Key method and the Three-Script Theory names and marks are trademarks or proprietary marks of the company.

5. Licensing

For institutional, publishing, commercial or API licensing, see Enterprise & Developers / For Institutions, or email 2741448@gmail.com.