Legal analysis: Prove the authenticity of the contract according to the following conditions: 1, and the actor has corresponding capacity for civil conduct; 2. The meaning is true; 3, does not violate the law or social public interests. Because the above three conditions are the general standards of the legality of civil acts, of course, they should also be applied to the civil acts of the parties who sign the contract.

Legal basis: Article 465 of the Civil Code of People's Republic of China (PRC). Contracts established according to law are protected by law. A legally established contract is legally binding only on the parties, except as otherwise provided by law.