Originally Posted by
chollie
March? May? I also want to go to Xi'an, my visa expires in early September. I'm hoping to hit a spring 'shoulder', no massive summer crowds but clear outdoor weather.
IME, SH is good from mid March onwards, while BJ shifts in early May. A third problem I forgot to mention about BJ spring is those annoying cotton_ball/pollen things. Apparently, the city has taken serious measures to replace the type of tree that is the culprit, but it's still unpleasant, to say the least. Basically, try to arrive in BJ after the trees are fully bloomed, and all will be good.