Chengyangyang Yang contributed to both the google/swiftshader and google/skia repositories, focusing on cross-platform build systems and graphics programming. In SwiftShader, Chengyangyang Yang expanded platform support by adding Loongarch64 CMake build integration, ensuring compatibility with LLVM 16 and improving CI reliability. For Skia, Chengyangyang Yang addressed memory management and stability issues in rendering workflows, updating C++ code to prevent segmentation faults and pointer errors in image initialization and raster operations. The work demonstrated a strong grasp of C++, CMake, and debugging, delivering targeted fixes and enhancements that improved build stability, memory safety, and rendering fidelity across diverse environments.