West Lake Vinegar Fish, also known as Uncle and Sister-in-Law Chuanzhen, is a traditional Han Chinese flavor dishes in Hangzhou, Zhejiang Province. According to legend, in the Song Dynasty, uncle and sister-in-law for brother and husband to avenge the repeated obstacles and experience the sweet and sour taste of life, the creation of this dish. Grass carp is usually used as the raw material and cooked. After burning, poured with a layer of smooth and oily sweet and sour, pectoral fins up, the fish meat is tender and beautiful, with crab flavor, tender and sweet and sour.