Changrong Li contributed to the cse110-sp25-group12/cse110-sp25-group12 repository by developing a Card Visual Design Asset Library and enhancing administrative documentation and testing workflows. Over two months, Changrong introduced new card design image assets, integrated them into the frontend UI, and removed unused files to maintain asset hygiene and visual consistency. Additionally, Changrong added a signed PDF rules document to support compliance and implemented comprehensive JavaScript unit tests for application creation, covering edge cases and data persistence in localStorage. The work demonstrated solid frontend development and unit testing skills, focusing on maintainability, reliability, and alignment with project requirements.