Looks like they used the same concrete in the piers and foundations of the building as the one used in the dams that broke a few years ago when they had all this bad rain and flooding. Turned out that "the officials" and "local councils" took some back pay to look the other way and only used some of the money to actually pour concrete. The rest was hollow cladding "rendered" to look like concrete. Too much corruption in the building industry in China I reckon. The only solid wall there seems to be the great wall