what you saw may have been parts of the ghost site that the Chinese built in the wake of the great financial market crisis of 2008/2009 to stimulate the economy. and that is now starting all over again. in addition, there is the effect of the collapse in demographics. this is a phenomenon that we will also see in the West, real estate markets that are going into a secular downward trend.

TomK

econ

China's housing market continues to deflate

I’ve seen videos of some of the apartment buildings being pulled down. A lot of them appear to have defective build quality. What a crazy economy!! 
On the flip side isn’t the real estate market globally due a correction at some point? I’ve seen a lot of housings estates built where I live and again the build quality is not good in some of them. For example Persimmon homes have been doing shoddy builds. 