During January 2026, Cai Rongzeng developed support for the SkyHigh S35ML-3 SPI NAND flash device within the DragonBluep/openwrt repository, focusing on the Linux kernel’s MTD subsystem. He implemented on-die ECC awareness and introduced safeguards against raw device access, directly addressing data reliability and hardware compatibility concerns for embedded systems. Working primarily in C, Cai integrated these features at the kernel level, ensuring robust error correction and reducing maintenance risks for future deployments. Although no bugs were fixed during this period, the depth of his kernel development work demonstrated strong proficiency in embedded systems and low-level hardware interface programming.