The address icon will missing sometime when I flashed to US boot and CHN 2.20. How to recover? Thanks.

Edit:
I found the resolution. Using set home function, the address icon will coming out again and never disappear.

Edit 2:
@turboccc: Can I flash CHN firmware directly on 3750US or US boot.bin + CHN fw_resource1.bin and fw_all.bin? By the way, which is the most recent CHN firmware version working on 3750US? Thanks for your help.