Worked on the ihub-pub/RuoYi-Vue-Plus repository, delivering a system-wide refactor focused on backend performance and maintainability. The work involved optimizing Java code by removing unused sleep calls, centralizing thread management with a utility method, and refining query ordering and status update logic to improve response times and correctness. Enhanced mail property documentation was introduced to streamline onboarding and reduce configuration errors, while SSE logging was streamlined for better observability. The approach emphasized code optimization and refactoring, resulting in improved reliability and easier maintenance. No explicit bug fixes were recorded, as the primary outcome was stability and performance improvement.