The power of attorney must be signed by myself to be valid. 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:

civil law

Article 165

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.

civil law

Article 166

If several persons are the same agent, unless otherwise agreed by the parties, they shall jointly exercise the agency right with others.

civil law

Article 167

If the agent knows or should know that the agency matters are illegal but still carries out the agency behavior, or if the principal knows or should know that the agent's agency behavior is illegal and does not raise any objection, the principal and the agent shall bear joint liability.