1, from the literature of traditional Chinese medicine, human milk is the best health care product. Therefore, in addition to normal dietary needs, such as medicine, alchemy, old-age health care, etc., a large number of fresh human milk products are needed, and wet nurses become a profession;

2. If you are chosen as a nanny, it will help improve your family status and reduce the corvee tax;

3. The wars of past dynasties were complicated and the population ratio was unbalanced. Usually, husbands go to war and come back several years later. Women's family life is difficult and pregnant women can't live. So they joined the government and were taxed as wet nurses.