The Chinese are taking the Olympics 2008 thingy very seriously. All constructions must be completed in time, otherwise work must be stopped and cleaned up. So developers are going at extra speed trying to complete their buildings. Otherwise the stop-work order is going to delay their projects by up to a year. You can witness this construction frenzy the moment you arrive at the airport - I counted more than 100 constrcution cranes in the land opposite the runway!
pic: Olympics countdown at the Communist Museum, Tian'anmen.