C'mon mate, this cannot be your first trip into red Chinese limbospace.
Shhhhh. The PLAAF must've been running some sort of exercise (where they fly in a straight line, every move controlled by some guy on the ground--very tactical gents) and used the smokescreen of "weather" as a means of clearing the airspace.
Hint: a few hours of Rosetta Stone Mandarin and you may be able to pick up some tidbits while they incessantly bull**** with each other...on guard.
China.
