It's still ubiquitous in China, or at least was when I was there several years ago. On the other hand, perhaps because of that, some of their buildings seem to have insanely powerful ventilation systems. I remember being in a mall and talking with someone who was smoking only a few feet away, seeing the smoke get sucked straight up into the vents on the ceiling as he exhaled, and I couldn't even smell it (I have a rather sensitive nose, and the smell of tobacco is indeed fairly common outdoors.)