Zhexi Wang focused on backend and file system development in Go, contributing to the juicedata/juicefs repository. During the month, Zhexi addressed a critical bug in the Readdir function, which previously imposed a 4096-entry limit on directory listings. By implementing a loop to read all directory entries, Zhexi ensured complete and reliable directory traversal, particularly benefiting users working with large datasets on Windows via WinFsp integration. This change improved stability and reduced edge-case errors without introducing risk to existing workflows. The work demonstrated careful debugging and a strong understanding of cross-platform file system challenges in Go-based environments.