Legal analysis: nature of contract: 1, principle of freedom of contract. It means that as long as it does not violate the mandatory provisions of law and public order and good customs, the parties can freely choose and decide all matters related to the contract. 2. The principle of good faith. When engaging in civil activities, the parties shall be honest and trustworthy, perform their obligations in good faith, and shall not abuse their powers or evade their obligations stipulated by law or contract. 3. The principle of legality. Refers to the conclusion and performance of a contract, the parties shall abide by the mandatory provisions of laws and administrative regulations, and shall not disturb the social and economic order or harm the public interests. 4. The principle of encouraging transactions. Mainly aimed at the legislature and the judiciary, that is, in the legislative and judicial process, whether it is conducive to legal and effective transactions should be regarded as an important criterion.
Legal basis: Article 464 of the Civil Code of People's Republic of China (PRC). A contract is an agreement between civil subjects to establish, change and terminate a civil legal relationship. Agreements on status relations such as marriage, adoption and guardianship shall be governed by legal provisions on such status relations; If there are no provisions, the provisions of this part can be applied according to their nature.