情势变更发生后,当事人有义务在第一时间就合同的变更或解除进行谈判。若当事人因无法通过协商解决问题而诉至法院,只有在通过调整合同条款、无法消除情势变更引起的显失公平时才能解除合同。而且,解除合同的效果是面向未来的,不影响已经履行的部分义务。 After the situation changes, the parties have the obligation to negotiate the change or rescission of the contract as soon as possible. If the parties can not solve the problem through the complaint to the court, only by adjusting the terms of the contract, can not eliminate the apparent change in circumstances caused by the apparent unfair in order to terminate the contract. Moreover, the effect of rescission is future-oriented and does not affect some of the obligations already fulfilled.