合同是民事行为,不是民事法律行为,合法性不是合同成立的要件。依法成立的合同,其法律约束力是有层次的,完整的合同法律约束力包括一般法律约束力和特别法律约束力。依法成立但未生效的合同具有一般法律约束力;依法成立并生效的合同具有完整的法律约束力, Contract is a civil act, not a civil law act, the legitimacy of the contract is not an essential element. The legally binding contract of a contract that is established according to law is hierarchical. The legally binding contract of a complete contract includes general legal binding and special legal binding. A contract that has been established according to law but has not yet become effective is generally legally binding; a contract that is established and effective in accordance with the law is fully legally binding,