Qian Zhang developed a firmware compatibility enhancement for the QCA6698AQ chip in the qualcomm-linux/meta-qcom repository, focusing on improving device discovery and stability across upstream Linux kernels and embedded devices. By updating the linux-firmware ath11k board-2.bin file to include new chip and board identifiers, Qian ensured reliable operation and broader compatibility for the targeted hardware. The work involved Linux kernel development and firmware engineering using C, with careful alignment to upstream linux-firmware standards. Comprehensive documentation and traceable commit sign-off practices were followed, reflecting a methodical approach to maintainability and integration within embedded systems and open-source development workflows.