I flew through it once, and now I will never do it ever again...
I do feel that bigger name European airlines opting to reroute flights to China through Chengdu had all of above in mind
There used to be flights through Urumqi on EU-China routes just 2 years ago with stops just in it or in Almaty by quite a number of airlines.
The accursed flight I was on was done by China Southern
I’ve flown out of Urumqi once on a domestic. Even that domestic flight required a one night layover in Xian. Annoying.