As far as I know, there is an internation AIP for China that can be "publicly" accessed by anyone outside of China. And than there is a domestic AIP which contains data not accessible outside of China.

The domestic AIP has data on airfields, navaids, approaches and airways which are only useable by Chinese operators, as far as I know.

(There are some sources on the internet where you can access most of this data, that is, approach and enroute charts, usually outdated of course. The chart on avherald is likely from someplace on the net.)

Folks,
The highest airport in China, with RPT services, is around 15,200 ft.
Crews wear walk around bottles on the ground.

Yep. But this is "only" the ICAO version of the AIP China, that is, data accessible to international users, agencies, Jeppesen, etc...

Domestic airports like e.g. ZLGM (Golmud), ZUBD (Bamda) are not included. Yet, official charts for the airports do exist, just like there are airways that are not on ICAO charts but on domestic ERC charts e.g. H15 from Lhasa LXA VOR (N2918.0/E91) up north to Golumd GRM VOR (112.3, N3624.0/E09444.7).