During January 2026, Guanghan focused on backend stability for the ModelTC/LightX2V repository, addressing a logic defect in the WAN22 animation block. Using Python and leveraging strong debugging skills, Guanghan resolved an issue affecting the handling of offloaded CPU buffers during lazy loading, which previously risked animation glitches and CPU stalls. The fix was implemented with minimal code surface area and did not alter the public API, ensuring low deployment risk. Guanghan’s targeted engineering improved the reliability of the animation path for end users, demonstrating depth in backend development and careful attention to stability in complex loading scenarios.