I'm so in love with 2nd hand smoke that whenever I whiff it I sprint towards the front of said smoker so he/she may get a good look at my backside. If you are in China you will be doing this quite frequently if you do not smoke.

As a smoker in China, I prefer 1st hand smoke. In the light of your post, feel free to advise only expats who can put up with smokers in public places and schools to come to the PRC to 'teach'!
If I'm in a restaurant here with Chinese disobeying the 'no smoking sign', I'll light up. If there's subsequently trouble, which there has never been up to now, I'll take my just desserts, along with the Chinese smokers. Should another expat enter, and tell me to stub my cigarette, I'd tell him (or her) to fuck off!

BTW, you needn't go easy on me. Attack at your peril! I dunno who you think you are, but im my book... you're ....., well, enough said!