By this website, Lanzhou is not too bad.

來源: 於 2013-01-29 11:54:25 [舊帖] [給我悄悄話] 本文已被閱讀：次

Shijiazhuang (石家莊):579

is the worst most of the time. instead of HG, maybe it's a good idea to invest environment related companies in china.

http://www.aqicn.info/?city=all