Hejian city is located in the middle of the vast North China Plain. In ancient times, it was Hejian country, and in the Han Dynasty, it was named King of Hejian. It was a vassal and later set up a government. It was located in the traffic artery in the south of Beijing. After the Ming Dynasty, it was the "imperial road" leading to all parts of the south. According to legend, the width of the road was "eighteen bows". It has become a thoroughfare between the north and the south, commonly known as the first house in the south of Beijing. Therefore, all kinds of food cultures with North and South flavors have developed here, especially in the late Qing Dynasty, when eunuchs in the palace mostly came from Hejian area, and the Qing Dynasty declined, eunuchs in the imperial kitchen, a master cook in the palace, returned to their hometown, became folk and ate by craft. Therefore, there is a saying that "if you want to eat, the river will turn."

"Dragon meat in the sky, donkey meat on the ground" Since the last two dragons were eaten and one died in the Xia Dynasty, only the dragon slaying technique has been handed down, while donkeys have thrived for thousands of years, making people unable to finish eating. It is the best taste in the first world. The taste of donkey meat has long been enjoyed by the ancients. Song Qi, a bachelor of the Song Dynasty, passed by Luoyang, stayed with friends for several days, sang songs and drank wine, and ate donkey meat. Finally, he became red-eyed and killed the donkey instead of walking.

? Hejian's unique flavor of "big fire with donkey meat" has a long history. The earliest legend is that Li Longji, Emperor Xuanzong of the Tang Dynasty, came to Hejian before he ascended the throne, and a scholar "killed donkeys and cooked pork" to entertain Li Longji. After eating it, he even said: delicious; In the Qing Dynasty, Qianlong went down to the south of the Yangtze River, passed by the river, and missed the residence to eat in the folk. The owner had to put the leftover cakes on the donkey meat and put them in a big pot to heat them up. After Qianlong ate them, he repeatedly praised the delicious food.

? There is a saying in Hejian: "I'm afraid I can't see the big fire when I often go to the market", which means the status of big fire in the eyes of ordinary people and everyone's love for this food. After the founding of New China, donkeys could not be killed casually because of the protection of farm animals, so they had to be mixed with pork. He also created a stew made of donkey oil and starch and various medicinal materials. During the Cultural Revolution, he cut off the capitalist tail. Hejian, a unique food culture, all stopped. After the reform and opening up, the economy of villages and towns, especially the Migezhuang area in Hejian, is relatively open. The burnt donkey meat has become active again, and its cooking technology has developed at a higher level. There are deeper and more detailed studies on the preparation of fabrics, the shaping and cooking of flour cakes, the cooking of donkey meat in soup stock, and even the cutting of donkey meat. Even a simple stew has gathered many years of experience and skills of the old and new generations, which has become a secret story that is unique to the river.