Sour beets, such as fried ribs, veggie ribs, sour chickens, which are ready to eat, are people's cabbage. There's a sweet sour sauce in the supermarket called emerald sauce, which tastes good, sweet, which is sour enough with white vinegar or lemon juice, which is more transparent in its color, and which is very bright in its juice. Remember when Mom used to make plum ducks with sour sauce, not to mention delicious。