Guannan Wei contributed to the scala/scala-lang repository by addressing a documentation issue, specifically fixing a broken hyperlink in a blog post to ensure accurate navigation to the official Scala.js documentation. Using Markdown, Guannan identified the outdated URL and updated it to the correct https://www.scala-js.org/ address, delivering the change in a single, well-documented commit. This work improved the reader experience by reducing navigation errors and reinforced best practices in documentation maintenance. The contribution demonstrated attention to detail in technical writing and link hygiene, though the scope was limited to a single bug fix rather than broader feature development or code changes.