The conditions for the establishment of a contract mainly include 1, and there are two or more parties' laws in the contracting party. The so-called contracting subject refers to the person who actually enters into a contract. They can be both future parties to the contract and agents of the parties to the contract. The contractor is different from the contractor. The contracting party is the party to the contractual relationship. They are the people who actually enjoy contractual rights and undertake contractual obligations. Both parties must conclude the contract "according to law". The so-called "legally established contract" means that the conclusion of the contract must meet the requirements of laws and administrative regulations. Since the contract stipulates the relationship between the rights and obligations of the parties, and enjoys and undertakes the rights and obligations according to law, the conclusion of the contract must comply with the provisions of laws and administrative regulations. If the contract concluded by the parties violates the requirements of laws and administrative regulations, the law will not recognize and protect it. In this way, the purpose of reaching an agreement between the parties can not be achieved, and the conclusion of the contract will lose its legal significance. Both parties must reach an agreement on the main terms of the contract. That is, the contract must be agreed by both parties through consultation. The so-called consensus refers to the same and non-divergent views reached after negotiation and bargaining. 4, the establishment of the contract should have an offer and acceptance stage method. Offer acceptance is the basic rule of contract formation, and it is also a two-stage method that contract formation must go through. If the contract is not promised, but only stays in the offer stage, the contract is not established. A contract begins with the negotiation between the parties to the contract and is established through the agreement between the contract offer and the commitment to it. The contract shall meet the following conditions (1) before it takes effect. The parties to a contract must have corresponding capacity for civil rights, capacity for civil conduct and capacity for contracting, so as to become qualified contract subjects. If the subject is unqualified, the contract cannot have legal effect. (2) the parties' expression of will is true, that is, the actor's expression of will should truly reflect his inner meaning. After the contract is established, it is often difficult to judge whether the parties' expression of will is true from the outside, and the law generally does not take the initiative to intervene. The lack of elements of true expression of will, that is, the expression of will is untrue, does not absolutely lead to the invalidity of the contract. (3) It does not violate the law or public interests. The contract does not violate the law and public interests. It mainly includes two meanings: first, the content of the contract is legal, that is, the rights and obligations agreed in the terms of the contract and the object it points to, that is, the target. , should comply with the provisions of the law and the requirements of public interest. Second, the purpose of the contract is legal, that is, the reasons for the parties to conclude the contract are legal, the direct internal reasons are legal, and there is no fact that the illegal purpose is achieved by legal means and the law is circumvented. (4) Having the formal requirements for the entry into force of a contract as stipulated by laws and administrative regulations. The so-called formal requirements refer to the formal requirements for a contract as stipulated by laws and administrative regulations. Formal requirements are usually not the requirements for the contract to take effect, but if they are stipulated as the conditions for the contract to take effect by laws and administrative regulations, they will become one of the requirements for the contract to take effect. Without these formal requirements, the contract can't take effect. Except as otherwise provided by law.