Legal analysis: The parties concerned must provide the originals of valid documents such as ID cards (passports), birth certificates, etc. After the staff of the appraisal unit check and verify the identity, they will be copied and archived, and the originals will be returned to the parties immediately. The parties concerned must personally fill in the "Application Form for Paternity Testing", including the parties' basic information, reasons for application, etc. If the child is young and cannot write, the parents can fill it out on their behalf, and then the child can confirm it by fingerprinting. The paternity testing unit will take photos of the parties involved for archiving, and the group photos will be used in the paternity testing report. Collect blood samples from each client, with 2-3 ml of blood taken from each person; after the blood collection is completed, the person whose blood was collected is required to sign and confirm by fingerprints; the person concerned pays the paternity test fee. After the paternity testing unit collects the blood sample of the client, it usually makes a paternity testing report that is reviewed and authenticated by experts within 3 weeks, and then sends it to the entrusting unit or client, and the experts are responsible for interpreting the test results.

Legal basis: "The People's Republic of China and the Civil Code"

Article 1067 If parents fail to fulfill their obligations to support, minor children or adults who cannot live independently Children have the right to ask their parents to pay child support.

Parents whose adult children fail to fulfill their support obligations, who lack the ability to work or have difficulties in living have the right to require their adult children to pay alimony.

Article 1,127 The inheritance shall be in the following order:

(1) First order: spouse, children, parents;

( 2) Second order: brothers and sisters, grandparents, maternal grandparents.

After the inheritance begins, the first-order heir will inherit, and the second-order heir will not inherit; if there is no first-order heir, the second-order heir will inherit.

Children referred to in this article include legitimate children, illegitimate children, adopted children and dependent stepchildren.

The parents referred to in this article include biological parents, adoptive parents and step-parents who have a supportive relationship.

Brothers and sisters as referred to in this article include brothers and sisters of the same parents, half-brothers and half-mothers, adopted brothers and sisters, and step-brothers and sisters with dependent relationships.