During their two-month contribution to apache/dubbo, Rain Yu focused on enhancing codebase maintainability and reliability through targeted code cleanup, dependency management, and testing. They improved documentation by systematically removing outdated author tags from Java files, which streamlined source comments and facilitated future licensing audits. In addition, Rain updated the Hessian-lite dependency to ensure up-to-date library usage without introducing functional changes. Their work also included cleaning the test suite by eliminating obsolete bootstrap configurations and interfaces, reducing CI noise and maintenance overhead. These efforts, primarily in Java, contributed to a more maintainable and future-ready codebase for the Dubbo project.