I think the majority of China's vinegar actually comes from one really big SOE, that bottle from above post is one of theirs.
A few years ago when I was back in China I decided to visit their factory in 镇江 for fun. The factory was enormous. I raised a question to the tour guide about competition from those Northen Chinese really sour type of vinegar and she goes "actually those are made by us too, we have a big factory up in 山西 making that type of vinegar".
Their vinegar making is like the most well known thing about 镇江:
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Says right there in the encyclopedia! I figured maybe they would be worried about competition but turns out they're got it all in the bag. They're like the Standard Oil of vinegar. This type of aromatic vinegar has a pretty unique process where the rice wine produced in the first part of the process has to be oxidized inside a solid mix of rice husks and other ingredients to soak up the flavour, and those has to be turned daily to allow even oxidation. This big SOE has some years ago invented a machine with many paddles that can walk itself along a long trough to do this instead of requiring men with shovels so although the factory is huge due to all the urns of vinegar that's aging and whatnot, the amount of man power required is actually pretty low for the area that the factory takes up so it had a very empty feel walking around.
The fact that strategic (and in this case not so strategic) industries in China are dominated by SOE makes sanctions a lot easier to carry out.