合同要件事实的证明责任是案件裁判的疑难问题。从法律要件事实的角度,可以将《合同法》上的证据规范区分为四类:合同形式和合同内容所对应合同成立的证据方法规范、合同请求权及对之为抗辩的证据规范、就合同法律事实中的具体内容加以推定的规范即合同法律事实推定规范。 The burden of proving the facts of the contract is a difficult issue for the case adjudication. From the point of fact of law, we can divide the standard of evidence in “Contract Law” into four categories: the form of contract and the law of evidence, the right of contract and the evidence of contract, The specific content of the legal facts to be speculated that the norms that the contract legal facts presumption of norms.