Qingyang, Gansu Province, has the custom of making whole sheep as dowry. Giving a sheep as a wedding dowry means that the son-in-law should follow the example of the lamb and kneel down to nurse, so as to honor his parents-in-law and repay their pains. In order to show filial piety to the ewe, the lamb kneels and suckles, which is the origin of the lamb kneels and suckles. If a person is not filial to the elderly, even a lamb is inferior, so as to promote filial piety and social harmony.