Our contractual law has used those law principals for reference that has been established by the two fundamental legal systems and by both the convention on contracts for the international sale of goods and the international rules for the commercial contracts . it divides the causes of discharging contract into five cases : unavoidable accident , breach of contract , delay of performance , fundamental breach of contract and some other cases 我国《合同法》在规定合同法定解除事由时，借鉴了两大法系和《联合国国际货物销售合同公约》 、 《国际商事合同通则》所确立的原则，将合同法定解除事由具体化，分为不可抗力、预期违约、迟延履行经催告，根本违约，法律规定的其他情形等五种形态。
Neither party shall be held responsible for failure or delay to perform all or any part of this contract due to flood , fire , earthquake , snowstorm , drought , hailstorm , hurricane , or any other events that are beyond the control of the affected party and could not reasonably be expected at the time of conclusion of this contract or have been avoided or overcome by such party 合同当事人一方因洪水、火灾、地震、暴风雪、旱灾、冰雹、飓风或其他该方当事人无法控制，并在签订本合同时不能合理预见、无法避免或无法克服的事件造成其无法履行或迟延履行全部或部分合同义务，则该合同当事人应免责。
