Worked on the YunaiV/ruoyi-vue-pro repository, focusing on backend development and API integration using Java. Addressed a critical issue in the BPM module by fixing the Process Instance Copy user mapping bug, ensuring that user IDs are correctly preserved when process instances are duplicated. This change reduced the risk of data corruption and improved the reliability of downstream processes that depend on accurate user associations. No new features were introduced during this period, but the work emphasized code quality and stability improvements. The approach demonstrated attention to data integrity and careful handling of user data within complex backend workflows.