Speed of Updating Too SLOW

hello, after downloading software from official website, the speed of updating is sooooo slow, normally 20+kb/s, remaining time 800+ mins.
MacOS, Located in China( but my network is ok I could connect YouTube).

The IOS version is so fast. but I’d like to use a big screen as well as to download Zwift companion on mobile. So I have to use Zwift on laptop. Is there any solution with that? thanks a lot.

ops, right now, 12.5 kb/s 1732 mins remain.

No worries, it finish when I wake up today. Good