Legal analysis: Generally speaking, the act of signing a contract is a civil legal act. The parties may entrust others to act as agents in the form of power of attorney. Within the scope of authority of the agent, the agent can sign relevant documents on his behalf, which has legal effect. But as for the signature, it is best to sign it yourself; If you don't sign, don't sign, to avoid unnecessary disputes.

Legal basis: Civil Code of People's Republic of China (PRC).

Article 162 A civil juristic act carried out by an agent in the name of the principal within the scope of his agency authority is effective for the principal.

Article 168 An agent shall not engage in civil legal acts in the name of the principal and in his own name, except with the consent or ratification of the principal. An agent shall not, in the name of the principal, carry out a civil juristic act at the same time with other people he represents, except with the consent or ratification of the principal.