Xu Lu worked on the hafs-community/HAFS repository, focusing on maintaining GSI compatibility following the bufr 12.0 data format upgrade. Addressing a critical bug, Xu updated the ufbqcd subroutine to correctly handle integer data types, ensuring reliable data assimilation workflows. The work involved reverting unsupported isnan checks in vtcd, which were no longer valid with the new integer formats, and aligning submodule references to the latest development phase. Xu’s contributions centered on bug fixing and submodule management using Git, demonstrating a methodical approach to system reliability and compatibility during a period of technical transition, with depth in data format handling.