Today, I read the thread “[Radxa zero model RAM 512M not boot](http://Radxa zero model RAM 512M not boot)” .
After upgrade, I followed Jack’s comment --" download and copy the fix boot.cmd and boot.scr to /boot and reboot for the new kernel.
Kernel 5.10.69-1-amlogic could boot.
I hope this process will be added to “Install Wiki”.