Worked on backend development for the somle2005/ruoyi-vue-pro repository, focusing on order management and refund processing. Addressed a critical bug where refund amounts did not accurately reflect the final adjusted price after multiple price changes during pending payments. The solution involved updating the logic to ensure both adjustPrice and payPrice were cumulatively recalculated with each modification, so refunds would always use the correct final value. This stabilization work improved refund accuracy and customer trust. The work was implemented in Java, leveraging backend development skills to enhance the reliability of the order management system without introducing new features this month.