@sr4armbian Thanks for your response. I found a way to build the vendor release for my box with kernel 6.xxx. SD card and USB 2.0 flash drive are tested, and HDMI audio, HDMI video, Ethernet, and the front LED display are working so far. I am running it on my eMMC, but the built-in Wi-Fi and Bluetooth modules are not working. I have modified a bit of scripts to remove the HAOS part and create a firmware image that can be flashed directly via the factory flash tool using using usb cable in maskrom mode.