It is said that in many cities in China the governments actually did something similar. They broke parts of the roads repeatedly so that they could rebuild them later.
Rinse and repeat every time we get a new mayor. It's a tried and tested way of legally shoveling public taxpayer money into well connected private pockets.
I've seen similar corruption scandals in Western Europe as well, since the owners of construction companies and city leaders tend to not be strangers to one another, so I don't expect China to be any different here.
The city I'm in now puts everything in the area between the streets and the sidewalks. I don't have a sidewalk yet because there are some thing that will be going in next summer.