Nope. They don't check
FYI, you can get basically anything at the Supermarkets in Hong Kong so no need to shlep tons
When I said that ingredients aren't reliable there, I had HKG in mind. I quoted locals, mizrachi/ dati le'umi type of people who told me that, and they get everything shipped over from australia.
E.g. I bought a minute maid, normally 100% juice (which is an international brand, and in europe at least part of the coca cola corporation) in HKG, and started drinking. It had a funny flavor, so before swallowing, I checked, and it contains fish (!).