Legal analysis
Principal-agent itself refers to the civil legal act that the agent carries out in the name of the principal according to the relevant entrustment of the principal. Its effectiveness is directly attributed to the principal. According to the relevant national laws and regulations, there are two main forms of agency, namely, written form and oral form. In practice, the parties can take oral form or written form, but the laws and regulations stipulate that it is in written form and should be used in accordance with the provisions, such as litigation agent, signing economic contracts on their behalf, etc. An invalid contract concluded by an invalid agent shall include the following circumstances: 1. Relevant contracts concluded by unauthorized agents without the approval of the principal; 2. The agent signs a contract with himself in the name of the principal; 3. The agent signed the contract with others in the name of the principal and his agent; 4. The agent conspires with the other party to sign relevant contracts that harm the interests of the principal.
legal ground
People's Republic of China (PRC) Civil Code
Article 167 If an agent knows or should know that the agency matters are illegal, or the principal knows or should know that the agent's agency behavior is illegal, and he still acts as an agent without raising any objection, the principal and the agent shall bear joint liability.
Article 161 A civil subject may carry out a civil juristic act 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.