Having a lot of overbuilding would be a huge issue for a western real estate market. The difference is that they are not urbanizing at 20-30 million people per year and they do not have a political system where the government can go to the villages and rural areas and say - We have a million buses over there - get on your going to Kangbashi. There are more processes and procedures than that but Chinese leadership has far more flexibility to manage and direct the economy.
China has increased its hydropower target to 430 gigawatts by 2020, up from the current 200 Gigawatts. They will be adding the equivalent of a 18.2GW Three Gorges dam every year instead of older targets of a Three Gorges dam equivalent every two years The dammed rivers will be deeper so that large 10,000 ton barges can more cheaply move goods in and out of the interior so that non-coastal cities can also develop.
They will have more high speed rail (13,000 km) by the end of this year than the rest of the world combined (10,500-11,000 km. Europe +
Things are just different when your economy is going at 300 miles per hour instead of 65 miles per hour.