Who invented Peking duck?

According to legend, the beauty of roast duck comes from the precious breed of Peking duck, which is the best quality meat-eating duck in the world today. It is said that the breeding of this special type of pure white Peking duck started about a thousand years ago. It was because the emperors of the Liao, Jin and Yuan dynasties accidentally obtained this pure white wild duck species during hunting, and then raised it for hunting, and it has been continued ever since. This excellent pure breed was obtained and cultivated into today's valuable carnivorous duck species. It is a kind of white duck that is fattened by stuffing, hence the name "stuffing duck". Not only that, the Peking duck was introduced to Europe and the United States a hundred years ago, and became a blockbuster after breeding. Therefore, as a high-quality species, Peking duck has long been the source of valuable duck species in the world. Quanjude Roast Duck Restaurant was founded in the third year of Tongzhi in the Qing Dynasty. The founder, Yang Quanren, was from Jixian County, Hebei Province. He came to the capital alone due to floods in his hometown. When he came to the capital, he was first employed as a duck herder to make a living, and later he partnered with others in the business of selling raw chickens and ducks. Because of his hard work and thrifty housekeeping, he not only accumulated some money, but also accumulated a lot of experience in raising, slaughtering, and selling ducks. In 1864, Yang Quanren bought a "Dejuquan" dry and fresh fruit shop in the Meat Market Hutong outside Qianmenwai that was on the verge of bankruptcy. He asked a Feng Shui master to name it "Quanjude". One was to bring about the bad luck of "Dejuquan", and the other was to occupy the middle part of Yang Quanren's name. He asked the scholar Qian Zilong to write these three characters into a golden plaque and hang them on the lintel. Yang Quanren's "Quanjude" opened with great success. It is said that when he was a manager, he saw that the princes and nobles at that time were extremely extravagant and squandered money. After eating the banquet, he used a lotus leaf cake made of leavened dough to wipe away the greasy lips and threw it away. He was so angry that he told the people in the store that we in Quanjude cannot do such immoral things. From then on, a rule was set: Quanjude does not make yeast noodles as a staple food. The way to eat roast duck is to roll the duck meat into hot noodles and lotus leaf cakes. Anyone who eats roast duck, no matter how rich or poor, must roll it by himself. In the Southern and Northern Dynasties over 400 AD, the word "roast duck" appeared in "Shi Zhen Lu". In the Southern Song Dynasty, roast duck was already a famous product in Lin'an (Hangzhou) "market food". At that time, roast duck had not only become a folk delicacy, but also a delicacy in the homes of scholar-bureaucrats. But later, according to the "History of the Yuan Dynasty", after the Yuan Dynasty defeated Lin'an, the Yuan general Boyan moved the craftsmanship in Lin'an City to the capital (Beijing). From then on, the roast duck technology was spread to Beijing, and roast duck became the Yuan Dynasty. One of the rare treasures of the Imperial Palace. With the change of dynasties, roast duck became a delicacy in the Ming and Qing courts. During the Ming Dynasty, roast duck was still a must-have delicacy during the Lantern Festival in the palace, and was later officially named "Peking Roast Duck". With the development of society, Beijing roast duck gradually spread from the palace to the people