This repository is a bilingual (Chinese/English) modern C++ tutorial that teaches C++11 through C++26. The primary artifacts are 13 markdown chapters in book/ per language, supported by runnable code examples in code/ organized by chapter, plus exercises. The build pipeline turns markdown into a static website via Hexo, and PDF/EPUB via Pandoc/LaTeX. Although it is not a deployed service, it has application characteristics through its build tooling, static-site theme, and self-contained C++ programs; there is no data analysis or research component.