Manyang contributed to OpenXiangShan’s XiangShan-doc and GEM5 repositories, focusing on documentation quality and RISC-V architecture improvements. In XiangShan-doc, he enhanced the readability and consistency of technical documentation by refining Markdown formatting and correcting typographical errors, which streamlined contributor onboarding and PR review. For GEM5, Manyang refactored the RISC-V architecture decoder using low-level programming and ISA knowledge, removing redundant rv32-specific code and unnecessary zero or sign extension logic. This cleanup improved code clarity, maintainability, and set a foundation for future RISC-V extensions. His work demonstrated depth in compiler development and attention to documentation standards within collaborative projects.