Donkey fire is a very popular snack of Han nationality in North China. It originated in Baoding, an ancient city in Hebei Province, and spread widely in the central plain of Hebei Province, and later developed into two factions. Among them, Caohe area in xushui county, north of Baoding has the longest history. Round and well-marinated donkey meat is added to crispy fire with old soup. Baoding, as the catering cultural center of Hebei Province, is the birthplace of the ninth largest cuisine in China. The donkey meat fire in this catering center in Hebei Province has been continuously developed and popularized by hardworking Baoding people for generations, and it has been called a veritable Baoding except "iron ball, noodle sauce and spring is not old". At present, the common donkey meat burning shop in all parts of the country is Hejian donkey meat burning shop. Hejian donkey meat fire is mostly mixed with minced meat and donkeys. The fire is rectangular and donkey soup is clear soup. Donkey-burning shops can be seen everywhere in the streets and alleys of xushui county and Baoding, which are completely integrated into the lives of local residents. There are foods with similar names in Cangzhou, Hebei Province, but the practices and tastes are quite different. According to "Historical Records", the burning of donkey meat originated from Caohe River in Baoding in the second year of Ming Jianwen (AD 1411), and now it is all over the land of Yanzhao.

Caohe donkey meat is stewed with fire first and then with warm fire, with nearly 21 kinds of seasonings. It takes a long time to cook, is thoroughly cooked, has ruddy color, is fragrant but not firewood, has a long fragrance, and is soft and palatable. According to medical books, donkey meat nourishes blood, nourishes qi and deficiency, donkey-hide gelatin nourishes yin and nourishes blood, nourishes lung and moistens dryness. It can be seen that donkey meat not only tastes delicious, but also has health care function. Modern medical research shows that donkey meat is a low-fat and high-protein food with high calcium, phosphorus and iron content. Caohe donkey meat fire is famous in Beijing, Tianjin and Hebei catering markets.