Having lived many years in Beijing, I'm partial to northern China in the winter (I realize it may be an acquired taste!).  Two photoblogs, one from Dalian and one from Xi'an, start to convey the flavor of the bare branches, straight avenues, steam rising from roadside food vendors, bundled up pedestrians, smell of coal, and blue skies of a northern Chinese winter in the city. Ziboy is usually good for a slice of Beijing hutong winters (see his 2006.1 archive, for instance), but he's busy doing his magic in NYC at present. Something from Harbin or Yinchuan would also be wonderful, but have looked and can't find one. 

Photo Xi'an is presented in English and is done by Wang Zhifang, who describes himself as "a Xi'an citizen and also an undergraduate studying Geographic Information System (GIS) in Chang'an University, Xi'an."

Longtanwan is a Dalian photoblog with especially nice apartment and building photos.