What about red oil? In fact, the oil that is often said is pepper and sea pepper. Xi 'an claims that this oil is irritating. Red comes from pepper, and because spices are added to the stirring of high-temperature vegetable oil, it is mixed with fresh spicy and refreshing taste, and the color is red and bright, which is red oil. Generally, we say red oil wonton, and red noodle soup is like this. Our noodle restaurant here always asks guests "clear soup or red soup?" It means something like red oil.
I'm o (∩ _ ∩) o from Chongqing.