As ever, there are plenty of well-known cities below Lanzhou on today's air quality rankings (Dec 14), published by the Ministry of Environmental Protection.
Out of 86 locations, Lanzhou came 54th. Here is a selection of those places with worse air quality. The ranking is in brackets:
That's not to say the air is pristeen here at the moment, just another reminder that Lanzhou is a pretty average city these days, when it comes to pollution. Here is a photo of Anning District, taken today from the hills: