Good question. It was something Michael Hudson wrote. Essentially, it's to do with the way that China is financing local projects. IIRC provincial or regional authorities [The state government] could [print] money [and loan it to local governments] but China won't allow it [doesn't do that]. So [local governments] have to [raise finances, which ultimately come from] borrow[ing] from banks. This gives a certain leeway to a sector that is, let's say, known to get up to shenanigans. Hudson warns that China could be taking a mis-step. It's likely a subtler argument than I can explain [it was—see below]. I'll try to find the piece [linked, below].
Edit: I got this slightly wrong but as I note that in the comment below with the link and a quote, I didn't want to correct this comment and later readers to read the corrected version and think it was wrong. So I've amended it with strikethroughs and square brackets to show the changes. Old school editing, like.