Worked on the OI-wiki/OI-wiki repository to enhance the clarity and accuracy of algorithm documentation, specifically focusing on the explanation of the recursive greatest common divisor (GCD) algorithm. Addressed a documentation bug by correcting a typo in gcd.md, which clarified the termination condition and reduced the risk of reader misunderstanding. Employed Markdown for precise document editing and demonstrated strong technical writing skills to ensure cross-language clarity in both Chinese and English contexts. Maintained high standards of version control hygiene and concise commit messaging, contributing to the overall quality and reliability of the repository’s technical documentation without introducing new features.