You can sue to change the custody of the child and ask the other party to pay alimony, which is generally 20-30% of the income of the parent who has not raised the child. Support includes living expenses, education expenses and medical expenses. The specific alimony should be determined according to the local living standard and the possible actual living expenses of the children.

Legal objectivity:

According to article 1067 of the Civil Code of People's Republic of China (PRC), minor children or adult children who cannot live independently have the right to ask their parents to pay alimony. Parents who fail to perform their maintenance obligations, lack the ability to work or have difficulties in living have the right to claim alimony from their adult children. Article 1085 of the Civil Code of People's Republic of China (PRC) * * * After divorce, if the children are directly raised by one party, the other party shall bear part or all of the maintenance. 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.