With all due respect and caveats to those who were operating the flight:
I fly over and through Chinese Airspace ALL the time, well a great many times!
And yes there can be problems with getting wx avoidance clearances. To wit I have employed a rather different approach to gaining the required track.
1. Call as early as possible. "XXX requires yy NM L/R of track due weather, safety of flight"
To be fair this produces the required result and off we go.
However, if
"xxx negative remain 3 miles rht of track"
Apply method 2) XXX unable to proceed along cleared track due safety of flight,we are commencing a right hand orbit this position. Standing by for further clearance.
I have applied this method only once and the effect was immediate
and wx deviation was immediately granted.
The difference between "I request" and "I require" is the same as "I would like" and "I need".
I would need a Chinese speaker to tell me if the translations are significant.
Bottom line, if it IS THAT bad don't fly through it! Orbit!