Lu Jia focused on stabilizing AVRCP notification workflows within Zephyr-based Bluetooth systems, addressing reliability issues rather than introducing new features. Working in C and leveraging embedded systems expertise, Lu resolved two critical bugs across the zephyrproject-rtos/zephyr and nxp-upstream/zephyr repositories. The work involved correcting notification registration state handling and ensuring proper callback cleanup on disconnect, which restored consistent client notifications and prevented registration failures. By collaborating with upstream maintainers and providing commit-driven traceability, Lu improved the maintainability and correctness of Bluetooth AVRCP implementations, demonstrating depth in Bluetooth protocol development and a methodical approach to cross-repository bug resolution.