Their guardians can apply for permanent residence registration, marriage certificate or description of illegitimate births by presenting the Birth Medical Certificate and the household register of one of their parents, and follow the policy of voluntarily settling down with their parents. For those who apply to settle down with their father and have no household registration, they should also provide a paternity certificate issued by a qualified appraisal agency
 According to Article 36 of the Marriage Law, the relationship between parents and children shall not be eliminated by the divorce of parents. After divorce, whether the children are directly raised by the father or the mother, they are still the children of both parents. After divorce, parents still have the right and obligation to support and educate their children.
 Unmarried cohabitation
 Unmarried cohabitation is not protected in the marriage law, and the Supreme People's Court clearly stressed that the court will not accept requests for the dissolution of cohabitation only. Therefore, the unmarried cohabitation relationship is not protected by law, but only restricted by moral judgment.
 As long as you look at the reports of newspapers and news media, you can see how common the phenomenon of unmarried cohabitation without marriage certificate is. According to the report of the New Express, according to the investigation of the relevant departments of the Department of Civil Affairs of Guangdong Province, nearly 1/10 of the more than 1.96 million families in the province are "families", that is, 2 million "families". For various reasons, couples do not have marriage certificates and are not recognized by law. This is true only in Guangdong Province. So, we can imagine what the situation is like in the whole country. Although the law gives children born out of wedlock the legal rights and the legal obligations of the father and mother, the marriage law of our country does not protect the "de facto marriage" itself. This is mainly reflected in the fact that cohabitants have no inheritance rights to each other, and the law does not recognize that cohabitants have the obligation to support each other. As for the material and spiritual damage suffered by the innocent cohabitant due to cohabitation, there is also no legal provision.
 Under the existing legal conditions, if cohabitants want to protect themselves and are unwilling to choose to receive a marriage certificate, they can adopt a written agreement. For example, we can agree on each other's duty of loyalty, the sharing of expenses during the period of living together, and the method of compensation for damages when the other party's fault causes material or spiritual losses to us. It can also be agreed that the woman shall not propose to terminate the cohabitation relationship within a certain period of pregnancy and postpartum. As for the problem that the man does not pay the child support fees after the woman gives birth to the child, Article 21 of the Marriage Law actually has a clear provision, because it stipulates the rights and obligations between "parents" and "children". The parents here are not just "married parents", and the children here are not only "legitimate children".