legal analysis
a valid contract refers to a contract that has the effective elements of the contract and can produce the expected legal effect of the parties to the contract. Legal evaluation of the parties' agreement, in terms of the effectiveness of the contract, is to stipulate the effective elements of the contract as the evaluation standard. Contracts that meet the valid requirements shall be given legal effect according to the agreement of the parties, while contracts that do not meet the valid requirements shall be treated as invalid, revocable or with undetermined effect according to different circumstances. The expression of intention is true, which means that the expression behavior of the contracting party should truly reflect its inner effect meaning, that is, its effect meaning is consistent with the expression behavior. As an effective element of a contract, it is a natural requirement of the principle of party autonomy. The contract shall not violate the mandatory norms, which is determined by the purpose of the contract system and is a general principle. In addition to the mandatory norms of the law, the contract shall not violate the interests of the public. The subject matter of the contract determines the quality and quantity of the rights and obligations of the contract. Without it, the contract will lose its purpose and positive significance and should be invalid. The possibility of the subject matter of the contract means that the contract payment may be realized. The determination of the subject matter of a contract means that the subject matter of the contract is determined from the beginning or can be determined. The parties can understand the status and legal effect of the contract, which is of great significance to protect their legitimate rights and interests and reduce disputes. In principle, a natural person must have full capacity to sign a contract. A person with limited capacity and a person without civil capacity may not sign a contract in person, but his legal representative shall sign it on his behalf.
Legal basis
Article 143 of the Civil Code of the People's Republic of China is valid for a civil juristic act that meets the following conditions: (1) The actor has corresponding capacity for civil conduct; (2) the meaning is true; (three) does not violate the mandatory provisions of laws and administrative regulations, and does not violate public order and good customs.