As homophones and near-homophones, Chinese numbers when strung together and read aloud can produce results both auspcious and not. Scroll down and you'll find a good set of examples on this Wiki page:
http://en.m.wikipedia.org/wiki/Numbers_in_Chinese_culture
Thus be careful selecting any numbers you'll be saying out loud a lot in China, like a flat address or phone number. Same homophone problem arises in picking a child's name.

