This is unfortunately exactly how society operates in China. It is basically on the buyer to confirm that they're getting something acceptable. Once they've paid, it is what it is.

Not exactly. In 2008 there was a huge scandal where melamine was in baby's milk, so it isn't always what it is.

https://en.wikipedia.org/wiki/2008_Chinese_milk_scandal

Yes, if your malfeasance is large enough to be on the front page of the New York Times, you'll be sentenced to life in prison or even death. But killing babies is a bit more heinous than fraudulent ad clicks!

(Also of note: WHY melamine in the baby formula? Because they knew the buyer would check the nitrogen content, because it's a caveat emptor culture.)