Legal analysis: If the party who needs to sign is a minor, it needs to be signed by his legal guardian. Because minors are people without civil capacity, they must carry out civil acts under the supervision of legal guardians.

Legal basis: Article 20 of the Civil Law of People's Republic of China (PRC) * * * Minors under the age of eight are persons without capacity for civil conduct, and their legal representatives shall act as agents to carry out civil legal acts.