Donkeys are treated unfairly and belittled by human beings because of their ugly appearance. However, for thousands of years, people can't live without donkeys. How many literati and poets ride donkeys to recite poems, businessmen use donkeys to carry goods, farmers use donkeys to grind fields, and soldiers use donkeys to transport salaries. Even after his death, he devoted himself unreservedly, letting gluttonous people eat meat and chew bones, letting people with yang deficiency eat kidneys (whips), and letting rich men and women make skin cream to nourish their bodies. With the development and progress of society, machinery and vehicles gradually replaced donkeys and horses, and people slaughtered them excessively, so donkeys disappeared in most parts of China. There are only a few donkeys in the frontier and western regions as people's means of transportation, which are mainly distributed in Kashgar, southern Xinjiang. However, due to the needs of mainlanders to eat meat and boil skin, its number is greatly reduced every year, and it has become a rare species resource. Many areas in China have invested heavily in establishing protection stations to prevent extinction.

The milk is rich, holy and healthy.

Donkeys are treasures besides being loyal and hardworking to human beings. Its meat is not only delicious, but also protein is one quarter to one time higher than pork, beef and mutton, and its fat is equivalent to one fifth to one tenth. Rich in eight essential amino acids, it is a high-quality food with low fat and high protein, and also has certain health care and medical functions. People often say that "dragon meat in the sky, donkey meat on the ground" has its scientific truth. The health care function of donkey skin and donkey whip is well known, and has formed a certain industrial system. Well-known "Dong 'e Ejiao" and "Shaanxi spiced donkey meat" are well-known throughout the country.

Donkey meat and donkey skin are still so precious, and the essence of donkey body "donkey milk" is not only a kind of high nutrition, but also has more obvious health care function. Donkey milk is rich in selenium, whey protein, essential amino acids, essential fatty acids and epithelial cell growth factors, which is called the treasure of milk by nutrition circles.

Sun Simiao, the king of medicine in Tang Dynasty, and Li Shizhen, the sage of medicine in Ming Dynasty, both elaborated and affirmed the medicinal efficacy of donkey milk. Foreigners also have a high opinion of donkey milk. Americans say donkey milk is a stimulant for work. Indians call donkey milk the best milk for babies; An Italian lady named torrisi raised a donkey to save her son, and the story was passed down as a much-told story. Egyptians call donkey milk a beauty treasure ... so foreigners regard donkey milk as a panacea and a panacea for all diseases.

Donkey milk can preserve health and cure all diseases, but because the milk production period of donkeys is very short, the milk production is very small. A milk production period is only 100 days, and only about one kilogram is produced every day, so the resources are rare and precious. Industrialization has never been formed before, and ordinary people have no happiness to enjoy, just a few luxuries of the powerful.