Appreciate the info! I guess it does not worth the effort. Any other options to revive the router? Here is my serial console output:
U-Boot SPL 2019.07 (Jun 08 2022 - 15:20:20 +0800)
Strap register: 0x7fffdf43
Board is non secure
$SPL: 5.04L.02@348603 $
nand flash device id 0xc2da9091, total...