During April 2025, Chun Nan worked on the NVIDIA/edk2-nvidia repository, focusing on embedded systems and firmware development using C and Device Tree. He addressed a bootloader issue by enabling zero-size VPR (Video Processing Region) Device Tree nodes, allowing Linux to manage VPR region sizes dynamically at runtime. This technical solution involved modifying the Device Tree handling so that zero-sized VPR nodes are marked as 'okay,' resolving previous incompatibilities and improving hardware compatibility and memory utilization. Chun Nan’s targeted fix demonstrated a deep understanding of low-level system interactions, contributing to more flexible and stable boot processes for NVIDIA EDK2 platforms.