According to legend, there was a temple in Baiyun Mountain in ancient times, and there was a clear spring behind it, which was infinitely sweet. There is a little monk in the temple who is naughty and greedy. He likes eating pork since he was a child. After becoming a monk, do odd jobs and cook for monks. One day, when Master was out, he secretly went to the market to buy some of the cheapest pig hands and was about to cook them. Suddenly, Master came back, and the young monk hurriedly threw the pig's hand into the clear spring pit behind the temple. After a few days, I finally hoped that Master would go out again. He hurried to the mountain spring to catch those pig hands, but found a strange phenomenon. These pig hands are not only not rancid, but also whiter. The young monk put the pig's hand in the pot, added some sugar and boiled it with white vinegar. Try it when it's ripe. These pig hands are not fat or greasy, refreshing, sweet and delicious. The young monk was pleasantly surprised. After that, he not only opened his own meat, but also attracted other monks to break fast. Later, Baiyun pig hand spread to the people, and people followed suit.