Li Long focused on improving the reliability of Wi-Fi startup flows in the nxp-upstream/zephyr repository by addressing a bug related to network interface selection. Using C programming and network programming skills within an embedded systems context, Li added explicit validation of network interface types in the get_iface function. This approach ensured that only interfaces matching the expected type could be selected, reducing the risk of misconfiguration. Enhanced error handling and user feedback were also introduced, allowing for clearer diagnostics when interface mismatches occurred. The work demonstrated careful attention to robustness and maintainability, though it was limited in scope to a single bug fix.