If there was snow on the ground or in the forecast we did not do the SHA or PEK flights... Cancelled them. Just didn't trust what they would put on the wings...
I remember being told to "Go Home" several times flying in China. "Airway closed. You turn around and go back Hong Kong." I was also told to, "Go back Shanghai. Military close airspace.", on another occasion...
So we did...
Cheers...