Tang Tianhang focused on backend development in Go, contributing to the milvus-io/milvus repository by addressing reliability and data integrity in BM25 statistics registration. He engineered a concurrency-safe solution that ensures BM25 statistics are registered for all sealed segments during multi-segment loads, resolving a bug where previous logic could skip segments and cause incomplete data. By refining the registration process within the querynodev2 module, Tang eliminated related warnings and improved the accuracy of ranking and distribution snapshots. His targeted fix enhanced search quality and operational reliability, demonstrating depth in Go concurrency and backend systems while maintaining safety across existing load paths.