Most Asian men smoke, 99% of Chinese men smoke.
I used to swear someone was smoking somewhere on Chinese flights, but what it is, is the stench of all their clothes coming through the air con/air recycling system.
There is no smoking on Chinese trains by the way, so the azzholes all stand in the carriage joins and smoke, also the toilets of course. But absolutely not on the Bullet trains, they stop for about 2 mins at some stations and they all dive off, draw the hell out of a ciggy and quickly cram back on, really pathetic to be a slave to something like that.