such as earthquake, typhoon, flood, fire and war and other unforeseen events and their happening and consequences are unpreventable and unavoidable, the prevented party shall , by cable, notify the other party without any delay, and shall , within 15 days thereafter, provide the detailed information of the events and a valid document for evidence issued by the relevant public anization for explaining the reason of its inability to execute or delay the execution of all or part of the contract. The parties to the contract shall, through consultations, in accordance with the effects of the events on the performance of the contract, decide whether to terminate the contract or to exempt the part of obligations for implementation of the contract or whether to delay the execution of the contract.