Maoying Han focused on improving internal code quality for the xpsi-group/xpsi repository, targeting technical debt and maintainability. Over the month, Maoying removed unnecessary print statements from the CustomPhotosphere module and enhanced the integrator function with clarifying comments, directly addressing console noise and code readability. Using Python and leveraging skills in code documentation and scientific computing, Maoying’s work laid a foundation for future feature development by making the codebase cleaner and easier to understand. These targeted refactoring efforts improved repository health, reduced the risk of regressions, and streamlined onboarding for new contributors, demonstrating a thoughtful approach to sustainable engineering.