China is contrary to a popular belief capitalist country, so yes they are private. I appreciate your feedback regarding public infrastructure and I will remember it when talking about chinese infrastructure again, however falling skyscrapers are still a serious issue which at this scale should have already been addressed by CCP especially by self proclaimed socialist government.

A skyscraper falling is a serious disaster and its construction should be heavily regulated by the government. China having the most skyscrapers doesn't make it okay for any skyscraper to fall and the people responsible should be behind bars. Seeing how often it happens clearly shows that the risk can be ignored and there is a failure in the system.