What are the characteristics of the contract?

The characteristic of a contract is a legal act of both parties, and it is conditional on the agreement of opinions; Contract is a civil legal relationship between equal subjects, and both parties to the contract are in an equal position, and neither party is allowed to restrict or force the other; A contract is an agreement with corresponding legal effect. Article 51 of the Civil Code of the People's Republic of China * * After the contract comes into effect, if the parties have not agreed or clearly agreed on the quality, price or remuneration, place of performance, etc., they may supplement it by agreement; If a supplementary agreement cannot be reached, it shall be determined in accordance with the relevant provisions of the contract or trading habits.