Worked on the IntensiveCoLearning/english_2nd repository, focusing on enhancing the Hyl & Junhua Activity Log through targeted documentation updates. The work involved adding new activity date entries and links for October 2024, ensuring that the log remained accurate and easy to audit. Using Markdown as the primary language, the developer applied disciplined version-control practices to maintain traceability and support cross-team collaboration. No code changes were required, as the emphasis was on documentation quality and maintainability. This approach enabled faster quality assurance and streamlined reporting on student activities, demonstrating a methodical commitment to documentation as a core engineering skill.