How should laws give remedies to the aggrieved party in case of nonperformance of one party ( renunciation and impossibility of performance ) in medium - term of their contract , which is from effective date to the deadline for performance of the contract 合同从有效成立至合同履行期限届至前(合同中期)出现一方不履行(拒绝履行和履行不能)的情况时，法律应如何对受害方予以救济
2 if the time limit for performance is unclear , the debtor may at his convenience fulfil his obligations towards the creditor ; the creditor may also demand at any time that the debtor perform his obligations , but sufficient notice shall be given to the debtor 二履行期限不明确的，债务人可以随时向债权人履行义务，债权人也可以随时要求债务人履行义务，但应当给对方必要的准备时间。
If the time limit for performance is unclear , the debtor may at his convenience fulfill his obligations towards the creditor ; the creditor may also demand at any time that the debtor perform his obligations , but sufficient notice shall be given to the debtor （二）履行期限不明确的，债务人可以随时向债权人履行义务，债权人也可以随时要求债务人履行义务，但应当给对方必要的准备时间。
The rule for putting responsibility on the violated is one in which fault is not considered ; the remedies for anticipatory breach are as follows : i ) suspending performance of the obligation ; ii ) declaring the contract avoided ; iii ) damages and so on 预期违约适用的归责原则是无过错责任原则。预期违约的责任方式有： 1 、中止履行； 2 、在履行期限届至前解除合同； 3 、要求损害赔偿等。
Article 252 terms of contract of hired work a contract of hired work includes terms such as the subject matter of hire , quantity , quality , remuneration , method of hire , supply of materials , time of performance , standard applicable to and method of acceptance inspection , etc 第二百五十二条承揽合同的内容包括承揽的标的、数量、质量、报酬、承揽方式、材料的提供、履行期限、验收标准和方法等条款。
Anticipatory breach of contract destroys the balance of the two parties " benefit . to protect the innocent party , the anglo - american genealogy of law sets up a remedy system of anticipatory breach . in the remedy system of anticipatory breach , there are different measures to different situations 在非即时清结交易场合，合同当事人基于自身利益或者客观原因，有可能在合同有效订立后至履行期限届满之前发生毁约行为，这就是所谓的“预期毁约行为” 。
Article 12the contents of a contract shall be agreed upon by the parties , and shall generally contain the following clauses : ( 1 ) titles or names and domiciles of the parties ; ( 2 ) subject matter ; ( 3 ) quantity ; ( 4 ) quality ; ( 5 ) price or remuneration ; ( 6 ) time limit , place and method of performance ; ( 7 ) liability for breach of contract ; and ( 8 ) method to settle disputes 第十二条合同的内容由当事人约定，一般包括以下条款： （一）当事人的名称或者姓名和住所； （二）标的； （三）数量； （四）质量； （五）价款或者报酬； （六）履行期限、地点和方式； （七）违约责任； （八）解决争议的方法。
The composition of the basic includes following parts : i ) one party has substantial facts to prove the other party will not perform the contract ; ii ) the violation can be clearly seen , iii ) the other party ' s conduct is the basic violation of the contract ; iv ) the time of violation is between the establishment of the contract and the beginning of the performance period 前者也由四大要件构成： 1 、有一方当事人不履行合同的客观事实； 2 、上述事实必须达到“明显看出的程度” ； 3 、不履行必须构成根本违反合同； 4 、违约时间在合同成立后，合同履行期限界至前。
Clause 2 where a contract was formed before the operative date of the contract law , but the prescribed time limit for performance extends beyond , or commences after , the operative date of the contract law , if a dispute arises out of its performance , the relevant provisions of chapter four of the contract law shall apply 第二条合同成立于合同法实施之前，但合同约定的履行期限跨越合同法实施之日或者履行期限在合同法实施之后，因履行合同发生的纠纷，适用合同法第四章的有关规定。
The remedy system of anticipatory breach is a new thing to china . the main purpose of this essay is to find out what is anticipatory breach of contract and the rights of the innocent party from studying continental genealogy of law , anglo - american genealogy of law , international convention and international customs . this essay includes nine parts 英美法上创立的预期毁约制度，根据不同的预期毁约情形赋予守约方在履行期限到来之前享有不同的权利：或解除合同，提起损害赔偿诉讼，使守约方从无望的合同中解脱出来；或中止合同的履行，要求对方提供保证，减低守约方的不安全感。
