Anyway, I think we might be looking too hard for large problems where there might not be any. Don't forget that we have a similarly ridiculous situation in America: for every homeless person there are 26 houses that are vacant. Considering that China's population is a 1.35 billion (about a billion more than America's), at least in one respect it would seem like a prudent choice to build high-rises in place of crudely-made one or two-storey building houses in anticipation of future housing issues.