If my passport expired and I don't renew it on time in Jan. 2013, I will wait until I plan to return to China, say may, 2013, may be two months before returning, does the china consulate will renew it for me?
-Yes, they can renew it for you even if after your passport expires, but you may pay some extra fee. If your passport expires when you are in China, you have to renew it in China, otherwise you can not leave China for US. By the way, why don't you renew it in US before it expire? You can renew it in advance up to one year before it expires.