According to the book "Wu Yue Chun Qiu", it was out of the political need to assassinate Wu Wangliao that Wu Gong invited Zhuan Xu, a warrior, to "roast fish" in Taihu Lake, invited a master of cooking fish from Taihe Academy, and put a "fish-gut sword" in the belly of the grilled fish to assassinate him. As far as "grilled fish" is concerned, its cooking skills are quite complicated in terms of color, aroma, taste and shape. Today's famous Suzhou dish "sweet and sour mandarin fish" was developed from the original "grilled fish". Later, the king of Wu held a dragon boat banquet tour every year and began a palace banquet tour. Suzhou cuisine has gradually developed into exquisite boat cuisine.