【正文】 other and there is no order of priority in respect of the performance of obligations, the parties shall perform the obligations simultaneously. Ea party has the right to reject any demand by the other party for performance prior to the performance by the other party. If the performance of the obligations of the party who is to perform first is not in conformity with the agreement, the party who is perform later has the right to reject the other party39。s demand for corresponding performance.　　Article 67 Where both parties have obligations toward ea other and there is an order of priority in respect of the performance, and the party who is to perform first fails to perform, the party who is to perform later has the right to reject the other party39。s demand for performance. If the performance of the obligations of the party who is to perform first is not in conformity with the agreement, the party who is to perform later has the right to reject the other party39。s demand for corresponding performance.　　Article 68 The party required to perform first may suspend its performance if it has conclusive evidence showing that the other party is under any of the following circumstances: 　　 (1)its business has seriously deteriorated。 　　 (2)it has engaged in transfer of assets or withdrawal of funds for the purpose of evading debts。 　　 (3)it has lost its business creditworthiness。 　　 (4)it is in any other circumstance whi will or may cause it to lose its ability to perform. 　　 Where a party suspends performance without conclusive evidence, it shall be liable for brea of contract.　　Article 69 If a party suspends its performance in accordance with the provisions of Article 68 of this Law, it shall timely notify the other party. If the other party provides appropriate assurance for its performance, the party shall resume performance. After performance was suspended, if the other party fails to regain its ability to perform and fails to provide appropriate assurance within a reasonable time, the suspending party may terminate the contract.　　Article 70 Where the obligee fails to notify the obligor of its separation, merger, or ange of the domicile, thereby making it difficult for the obligor to perform its obligations, the obligor may suspend its performance or escrow the subject matter.　　Article 71 The obligee may reject the obligor39。s advance performance of its obligations, except that the advance performance does not harm the obligee39。s interests.　　 Any additional expense incurred by the obligee due to the obligor39。s advance performance of its obligations shall be borne by the obligor.　　Article 72 An obligee may reject the obligor39。s partial performance, except that the partial performance of its obligations does not harm the obligee39。s interests.　　 Any additional expense incurred by the obligee due to the obligor39。s partial performance of its obligations shall be borne by the obligor.　　Article 73 Where the obligor is remiss in exercising its due creditor39。s right, thereby harming the obligee39。s interests, the obligee may petition the People39。s Court for subrogation in its own name, except that the creditor39。s right exclusively belongs to the obligor. 　　 The extent to whi the subrogation rights can be exercised is limited to the obligee39。s rights. The expenses necessary for the obligee to exercise su subrogation rights shall be borne by the obligor.　　Article 74 Where the obligor waives its creditor39。s right against a third party that is due or assigns its property without reward, thereby harming the obligee39。s interests, the obligee may petition the People39。s Court for cancellation of the obligor39。s act. Where the obligor assigns its property at a low price whi is manifestly unreasonable, thereby harming the obligee39。s interests, and the assignee is aware of the situation, the obligee may also petition the People39。s Court for cancellation of the obligor39。s act.　　 The extent to whi the right to cancel can be exercised is limited to the rights of the obligee. The expenses necessary for the obligee to exercise the right to cancel shall be borne by the obligor.　　Article 75 The right to cancel shall be exercised within one year form the date the obligee knows or should have known of the matter for cancellation. Su right to cancel shall lapse if the obligee fails to exercise su rights within five years from the date of the occurrence of su act. 　　Article 76 Once a contract bees effective, a party may not refuse to perform its obligations thereunder due to a ange in its name, or its legal representative, the person in arge, or the person handling the contract.　　apter 5 Modification and Assignment of Contracts　　Article 77 A contract may be modified if the parties rea a consensus through consultation.　　 If the laws or administrative regulations so provide, approval and registration procedures for su modification shall be gone through in accordance with su provisions.　　Article 78 Where an agreement by the parties on the contents of a modification is ambiguous, the contract shall be presumed as not having been modified.　　Article 79 The obligee may assign its rights under a contract, in whole or in part, to a third party, except under the following circumstances: 　　 (1)su rights may not be assigned in light of the nature of the contract。 　　 (2)su rights may not be assigned according to the agreement between the parties。 　　 (3)su rights may not be assigned according to the provisions of the laws.　　Article 80 Where the obligee assigns its rights, it shall notify the obligor. Su assignment will have no effect on the obligor without notice thereof.　　 A notice by the obligee to assign its rights shall not be revoked, unless su revocation is consented to by the assignee.　　Article 81 Where the obligee assigns its right, the assignee shall acquire the collateral rights related to the principal rights, except that the collateral rights exclusively belong to t