I just returned from Shanghai and Sanya. There are a lot of dark apartments in Shanghai at night. I know a few Chinese who own multiple apartments, some more than 10, most of these are empty. There are limits to how much they can invest overseas, and I believe investment in real-estate is greatly increased by this.
I feel they have a real-estate bubble of incredible proportions. Everyone talks real-estate too much, and there are too many advertisements for new developments. I don't think this will end well.