Beijing has a lot of interesting things to see, immperial Palace,Great Wall, and stuff about Olympics. Yunnan had many attractive sights including Zhongdian ('Shangri La'), Lijiang and Dali. And of course Xi'an is also interesting; there is more to see than just the entombed warriors. In winter, Harbin is a best choice to see the ice lantern and snow sculptures. To modern cityies, shanghai, Hong Kong and shenzhen are fine. So, which kind of sights do you prefer. :-)