The power of attorney requires the signature of the trustee. Where another person is entrusted to exercise the legitimate rights and interests on his behalf, the client needs to show the client's legal certificate when exercising his functions and powers, and the client shall not go back on the entrusted matters for any reason. Article 165 of the Civil Code stipulates that if the power of attorney is in written form, the power of attorney shall specify the agent's name, agency matters, authority and time limit, and shall be signed or sealed by the principal.

Legal objectivity:

Article 161 of the Civil Code: The scope of application of agency. A civil subject may carry out civil juristic acts through an agent. In accordance with the provisions of the law, the agreement of the parties or the nature of civil legal acts, civil legal acts that should be implemented by themselves shall not be represented.