What's the latest firmware version of Fenix 5X Hong Kong (Chinese) edition?

I use Garmin Express to check and the latest version is 6.0 only, however, when I check it in Garmin website, it show the latest is 7.6, how can I update to the latest version?

My watch has the problem to sync Application thru Garmin mobile Connect, every time when it try to sync the app, it fail in the middle then show sync fail. Any other has this issue and how can it fix? I'm using Android version (LG G6)