Ziyu Chen focused on enhancing build stability and server reliability across eesast/web and eesast/THUAI8. In eesast/web, Chen refactored dependency management by consolidating @antv/g2 version resolution within yarn.lock, aligning related packages to prevent conflicts and reduce CI failures. This approach leveraged JavaScript, Yarn, and shell scripting to ensure consistent builds and smoother release cycles. For eesast/THUAI8, Chen improved server startup reliability by fixing run.sh issues, exposing server status, and updating configuration defaults in C#. The work demonstrated depth in configuration and dependency management, addressing subtle integration issues and improving maintainability without introducing new bugs during the development period.