Worked on enhancing the readability of interview guides in the yangshun/tech-interview-handbook repository by systematically adding punctuation, specifically periods at the end of sentences. This documentation update aimed to improve clarity and professionalism for readers preparing for technical interviews. The approach involved careful content writing and technical writing using Markdown, ensuring consistency and traceability through a dedicated commit. By focusing on user experience and reducing cognitive load, the changes supported better onboarding and engagement with the handbook. The work demonstrated attention to detail in documentation practices, leveraging Markdown and content writing skills to deliver a targeted, user-focused improvement within one month.