Worked down in China for a while in Chengdu.
Smog was bloody awful.
The cleaners worked all day at the office, for no apparent reason, and used to cough up phlegm and gob it out the windows on to the public on the streets below.
Had to stick to the hotel restaurant, otherwise you had no idea what you were eating.
A mate of mine had his camera taken off him and all photos deleted before he got it back because he had taken pictures at a drill pipe storage yard.
Another mate of mine was arrested and chucked in jail for 3 days because he had been taking photos (his job) of our equipment being loaded out at a port. Seems that way in the back ground were a couple of Navy vessels.
Not in a rush to go back.....