Sorry to throw more fuel on the China fire, but... it is what it is. Also, the Chinese people deserve better than this, and there's a little chance awareness will help to solve it!
Some Chinese beer has been known to contain formaldehyde. At first I thought it would be a tiny amount as a brewing byproduct in all beer or something, but... no. It seems to be an additive - though it doesn't exceed WHO's drinking water standards.
It's sad. Why sell out your countrymen like this just to save a little cash? The crassness of this kind of thing really angers me.

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