Mutou fish refers to the "unpalatable" fish in Rushan, which is well-known in Jiaodong. In fact, it's not fish that tastes bad, but wine that tastes bad. Rushan people are bold, hospitable and sincere. Rushan people entertain guests without fish. After the founding of New China, the fish served in Rushan should be fresh sea fish and scaly fish. The order in which fish are served on the table, the position and direction on the table, and eating fish are all very particular, especially the persuasion of wine.