If it's about school children, That's the name of the signing parents. If the child has entered the society. But minors are basically signed by guardians. In addition to explicitly asking to sign my name type document.

Article 16 of the General Principles of Civil Law: Parents of minors are guardians of minors. If a minor's parents are dead or have no guardianship, one of the following persons with guardianship shall be the guardian: (1) grandparents; (2) brothers and sisters; (three) other close relatives and friends are willing to assume the responsibility of guardianship, with the consent of the unit where the minor's parents work or the residents' committee or villagers' committee of the minor's domicile.

. If there is any dispute about being a guardian, it shall be designated by the unit where the minor's parents belong or the residents' committee or villagers' committee where the minor's near relatives live. If a lawsuit is filed against the designation, it shall be ruled by the people's court. If there is no guardian as stipulated in the first and second paragraphs, the unit where the minor's parents work or