违约金是合同当事人一方或双方不履行合同或不适当履行合同时应支付给对方的一定数额的货币。它是各国合同法律制度中最常见的责任形式。理论上,按照不同的标准,可以对违约金进行多种分类:按照引起支付违约金的违约行为划分,有不履行合同的违约金和不适当履行合同的违约金;按照违约金的性质和作用划分,有惩罚性违约金、赔偿性违约金和二者兼具的违约金。而最常见的,则是根据违约金设 Liquidated damages are a certain amount of money to be paid to each other when one or both parties to the contract fail to perform the contract or perform the contract improperly. It is the most common form of liability in the legal systems of contracts in various countries. In theory, according to different standards, the liquidated damages can be classified into many categories: according to the breach of contract which caused the payment of breach of contract damages, breach of contract damages with non-performance of contracts and breach of contract damages with improper performance of contracts; in accordance with the nature and role of breach of contract damages , There are punitive damages, liquidated damages and both the liquidated damages. The most common is based on liquidated damages