Legal analysis: the amount of child support can be determined according to the actual needs of children, the affordability of both parents and the actual living standards in the local area. If you have a fixed income, you can generally pay the child care fee according to the proportion of 20% to 30% of the total monthly income. The proportion of nursing expenses borne by more than two children can be appropriately increased, but generally it does not exceed 50% of the total income. No fixed income, can refer to the above ratio, according to the total income of the year or the average income of the same industry to determine the amount of conservation fees. Under special circumstances, the above ratio can be appropriately increased or decreased. Parents' obligation to support their children ends when their children live independently (usually 18 years old).

Legal basis: Civil Code of People's Republic of China (PRC).

Article 1085 If a child is directly raised by one party after divorce, the other party shall bear part or all of the alimony. The amount and duration of the expenses shall be agreed upon by both parties; If the agreement fails, the people's court shall make a judgment. The agreement or judgment stipulated in the preceding paragraph shall not prevent the children from making reasonable demands to either parent over the original agreement or judgment when necessary.