Legal basis: Article 4 of the Administrative Measures for Health and Family Planning Units to Accept Public Welfare Donations (Trial) determines the principles that health and family planning units should follow when accepting donations: (1) Abide by national laws and regulations; (2) voluntary and unpaid; (three) in line with the purpose of public welfare; (4) non-profit; (five) unified acceptance and management of legal entities; (six) thrift, pay attention to practical results; (seven) information disclosure, strengthen supervision. Among them, "voluntary free of charge" is the core principle of donation, which requires that donations should not be accompanied by conditions that affect fair competition, and donations should not be linked to the purchase of goods.