It is actually a kind of mustard. Mustard is a unique vegetable in Asia and is rarely introduced from other continents. Mustard is a large category of vegetables, with about a dozen varieties. I'm from Luzhou, and I'd like to introduce the mustard varieties in Luzhou: Nanchong (Ercai, Waer and Beier), Zhacai (also called "Sister's Ercai" in Hejiang, Jiao Ling), Bangcai (with thick stems and wide petioles) and Kunming (with two-color stems). ), there is also a variety called Caitou (Chongqing called Caitou, similar to water chestnut, round and convex, can be used to make mustard tuber). It is said that potherb mustard mentioned by northerners is also a kind of mustard tuber. I haven't seen it, so I dare not make an assertion. There are many kinds of mustard tuber in other areas, such as Guangdong, but it won't be embarrassing if you don't know. As for "Applause for a big Nai Nai dish", this sentence is often used as a derogatory term in Luzhou area, which means questioning others' face. Exodus Do you think you are Nai Nai food? !