1, the principle of equality, the legal status of the parties to a contract is equal, and one party shall not impose its will on the other;

2, the principle of voluntariness, the parties have the right to voluntarily conclude a contract according to law, and no unit or individual may illegally interfere;

3, the principle of fairness, the parties should follow the principle of fairness to determine the rights and obligations of all parties;

4, the principle of good faith, the parties shall follow the principle of good faith in exercising their rights and performing their obligations;

According to the principle of prohibiting abuse of rights and the principle of public order and good customs, the parties shall abide by laws, administrative regulations and social ethics when concluding and performing a contract, and shall not disturb the social and economic order or harm the public interests.

People's Republic of China (PRC) Civil Code

Article 467

The general provisions of this part shall apply to contracts that are not explicitly stipulated in this law or other laws, and the provisions of the most similar contracts in this part or other laws may be applied by reference. Chinese-foreign joint venture contracts, Chinese-foreign cooperative operation contracts and Chinese-foreign cooperative exploration and development contracts in People's Republic of China (PRC) shall be governed by the laws of People's Republic of China (PRC).