合同的成立和合同的依法成立各种效力状态的合同都具有成立的情形,只要符合合同的形式要件,受要约方作出了承诺,合同即告成立。但是,只有依法成立的合同才具有法律效力。所谓依法成立,除了合同具备法定的形式要件之外,还要具备法定的实质要件。依照《民法通则》的规定,民事 The establishment of the contract and the contract in accordance with the law to establish a variety of effectiveness of the state have the establishment of the contract, as long as the formal requirements of the contract, the subject party made a promise, the contract will be established. However, only contracts that are legally established have the force of law. The so-called establishment according to law, in addition to legal requirements of the contract form, but also have the essential legal requirements. In accordance with the “General Principles of Civil Law”, civil