During May 2025, Zixx Deng focused on enhancing the Chinese translation of the C interop documentation in the cfug/dart.cn repository. By applying technical writing and localization skills, Zixx improved grammar and clarity in the Markdown-based documentation, making C interop guidance more accessible for Chinese-speaking developers. The work involved careful language quality assurance and git-based change tracking to ensure accuracy and maintainability. Although the contribution was limited to a single feature without bug fixes, the targeted improvements reduced potential misinterpretation and supported faster onboarding. This effort strengthened the localization workflow and laid a foundation for future bilingual documentation enhancements.