Changcheng Liu focused on enhancing documentation quality for the amzn/rdma-core repository, targeting API access flags and MLX5 API surfaces. Over two months, he consolidated and clarified man pages, correcting flag names and improving the structure and readability of technical documentation. Working primarily in C and Markdown, Changcheng aligned documentation with code changes, such as updating the IBV_ACCESS_OPTIONAL_RANGE flag and refining descriptions for functions like ibv_reg_mr_iova2 and mlx5dv_wr_set_mkey_sig_block. His work improved onboarding for new developers and reduced support overhead by making API usage clearer, while maintaining API compatibility and ensuring maintainability through documentation-only updates.