A contract (hé tong or hé tóng) is established between a natural person, a legal person and other organizations with equal subjects. It is an agreement to standardize the system of property right transfer under the condition of market economy. The contract laws of various countries regulate the creditor's rights contract, and the broad contract should also be the basic basis of the relationship.

Therefore, a contract is a legal act, a discussion by people, and a labor contract widely carried out in a market economy. These contracts are governed by other laws, including marriage, adoption and guardianship. These are not stipulated in China's contract law. In a market economy, the circulation of property mainly depends on contracts.