Before the river insurance, it was related to the "generation champion" of Nan 'an Prefecture. According to legend, Dai Quheng, the number one scholar in Qianlong period, gave a big banquet to thank his neighbors. Because of paying attention to the ostentation and extravagance of the "champion" seats, the chefs wrapped the cooked pork in the shape of a "champion hat" with local lotus leaves, and steamed it into a dish.