Legal analysis: when a party files a civil lawsuit, it shall submit the complaint, plaintiff's qualification certificate, prosecution evidence and other materials. Where an agent brings a civil lawsuit on behalf of the plaintiff, it shall also submit the qualification certificate of the agent. 2. The parties shall submit the original indictment signed or sealed by themselves, and submit copies according to the number of other parties. If it is really difficult to write a complaint, it can be made orally, recorded by the people's court and read to the plaintiff; After confirmation, the plaintiff shall sign or seal it.

Legal basis: Article 502 of the Civil Code of People's Republic of China (PRC), a contract established according to law shall come into effect upon its establishment, unless otherwise stipulated by law or agreed by the parties. In accordance with the provisions of laws and administrative regulations, if the contract should go through the approval procedures, such provisions shall prevail. If the failure to go through the formalities such as approval affects the effectiveness of the contract, it will not affect the performance of the obligation clauses such as approval and the effectiveness of relevant clauses in the contract. If the party that should go through the formalities for approval fails to perform its obligations, the other party may require it to bear the responsibility for violating its obligations. The modification, assignment and dissolution of a contract shall be subject to the provisions of laws and administrative regulations, and the provisions of the preceding paragraph shall apply and shall be subject to approval.