Seeing as how I started this POS thread, I thought I'd ought to finish it, hopefully without offending anyone else. There are two issues that I see. First, is, for lack of a better word, dental decom, that is rotting teeth. That is always bad. Second is intestinal flora. That can be good or bad. I have heard that Asian have more intestinal fortitude than Westerners generally, because they eat spicier food, which has many health benefits, as anyone from New Orleans will tell you. However, here it may come from hotpots, and that could be good or bad with regard to the quality of oils and ingredients. The best I can say is two bad reasons and one good reason for dragon breath, but no numbers or empirical evidence available to examine the issue beyond that.

According to the Urban Dictionary:

To have breath that of which smells as if one has licked the butthole of a dead skunk for several hundred years.

Oh my god, have you smelled aliennew's Dragon Breath... there aren't enough packs of gum on earth to help that!

The term 'dragon breath' was used in the 2017 film, Maya Dardel. I mistakenly added the 's. I'm not sure exactly what it meant, but after being in China for a while, it seemed like a likely interpretation. In my opinion, it was a good film, with an interesting script. So @new alien who seems to want to pick a fight, I'm guessing you have dragon breath, too.

Free dental care in the UK? I wish the US had that.

It is definitely cultural, but I think it goes beyond social class. For example, I think one of the reasons Chinese like very spicy food is because they can't taste it if it isn't that spicy. Smell and taste are inter-related. At Starbucks, and admittedly, I don't like Starbuck's coffee, the only coffee you can buy are these really dark roasts. Once again, I think it is because the Chinese can't taste a lighter roasted coffee.