If a child is born in violation of the provisions of this Ordinance, the administrative department of population and family planning of the county (city, district) people's government shall levy social support fees according to the following multiples of the per capita disposable income of urban residents or the per capita net income of farmers in the county (city, district) in the previous year: if one child is born, it shall be levied at two to three times; Because "the per capita net income of farmers in the last year", such as 10000 yuan *2.5=25000, cannot be multiplied by 2 (that is, two people), as far as I know, many family planning departments multiply the law by 2 without authorization.

Legal objectivity:

Article 41 of the Population and Family Planning Law. If a citizen does not meet the requirements of Article 18 of this law to have children, he shall pay social support fees according to law. Failing to pay the social maintenance fee payable in full within the prescribed time limit, an overdue fine will be charged in accordance with the relevant provisions of the state from the date of default; If it still fails to pay, the family planning administrative department that made the collection decision shall apply to the people's court for compulsory execution according to law.