Three sets of duck is a traditional dish of Han nationality in Yangzhou and Gaoyou, Jiangsu Province. Gaoyou Duck was abundant in Yangzhou and Gaoyou in ancient times (it was abundant in Yangzhou and Gaoyou in ancient times, but now it is specially bred in Yangzhou and Gaoyou. Because Gaoyou has the widest range of breeding and the most advanced technology, it is also called Gaoyou Duck, which is one of the three famous ducks in China. Gaoyou belonged to Yangzhou in ancient times and is now a county-level city in Yangzhou). This duck is very fat and is a high-quality raw material for making duck dishes such as "Nanjing salted duck" and "salted duck". With wild ducks as the main ingredients, the cooking skills of the three sets of ducks are mainly stewed vegetables, and the taste is salty and delicious. The "three sets of ducks" are fat and tender, the wild ducks are fragrant, and the pigeons are crispy and delicious. Some people praised this dish for its charm of "getting off the horse when you smell the fragrance and stopping when you know the taste". In the Qing Dynasty, the "Tiaodingji" recorded the specific production method of a set of ducks: "The fat duck is boned, and the dried salted duck is boned, and it is stuffed into the belly of the domestic duck, which is extremely steamed and whole." Later, the chef of Yangzhou restaurant boned wild ducks and stuffed them into domestic ducks, and pigeons boned them and then stuffed them into wild ducks, and created "three sets of ducks". Because of its unique flavor, it soon became famous throughout the country.