Xinhang Zhou focused on code quality and maintainability across several open-source repositories, including semaphoreui/semaphore, crytic/slither, and bytecodealliance/wasmtime. In Go and Rust, Zhou improved documentation clarity by correcting code comment typos and renaming functions to better reflect their purpose, enhancing future readability and developer understanding. Zhou also delivered a targeted error-handling refactor in erigontech/erigon, clarifying success signaling by explicitly returning nil for errors on successful operations. This approach reduced ambiguity in core data access layers, improved testability, and enabled safer future refactors. Zhou’s work emphasized code maintenance, documentation, and robust error handling in complex systems.