Worked on the Xiangyu-Hu/SPHinXsys repository to enhance simulation stability and maintainability over a two-month period. Focused on C++ development, the work involved refining kernel registration logic for particle dynamics, ensuring that computing kernels were conditionally registered only for relevant interactions, which reduced runtime overhead and prevented misregistrations. Refactored type aliases and updated tests to align with spatial-temporal representations, improving API clarity and test reliability. Additionally, contributed to code cleanup by removing unused test files, streamlining the test suite and reducing maintenance overhead. Emphasized robust software engineering practices, including refactoring, testing, and code hygiene, to support long-term project maintainability.