Dear NXP,
(1) emmc boot in u-boot mode. Press any key within 2 seconds.
Run command in u-boot mode as follows:
setenv mmcroot /dev/mmcblk2p3 rootwait rw
setenv mmcpart 2
run bootcmd

It can boot successfully.
(2) mkimage -T script -A arm64 -d boot.cmd boot.scr
(3) Unzip boot_scr.7z .Please check the boot.scr .
After reboot, run boot.scr will always stay in uboot mode

(3) How to modify boot.scr and make it boot normally ?