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ChinaTextbook is a collaborative academic repository and open educational resource designed to support long-term study planning. It functions as a version-controlled archive of textbooks, exercise sets, and instructional content, providing a centralized space for students to master complex academic subjects through structured guides and consistent practice. The project distinguishes itself by utilizing distributed version control to manage its entire library, ensuring that every revision and curriculum update is tracked and preserved. By storing all materials in lightweight plaintext files, the repository maintains universal compatibility and allows users to clone the complete knowledge base locally. This architecture enables full offline access to the curriculum, removing the need for backend servers or database infrastructure while facilitating independent study. The content is organized into a hierarchical directory structure that mirrors academic subjects and difficulty levels, allowing for intuitive navigation through the collection. This systematic approach to knowledge distribution supports collaborative curriculum management, where multiple contributors can maintain and improve the library of study resources over time.