Legal analysis: the signing of a contract between a company and a company requires the signature of a legal person. Specifically, civil and commercial contracts between companies require both the official seal of the company and the signature of the corresponding legal representative. According to the law, when a company signs a contract, it is usually signed by the legal representative on behalf of the company, so it needs the legal representative to sign and affix the official seal. Therefore, if a contract is signed between companies, in order to ensure the validity of the contract, the legal representative needs to sign 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.