Ar cle 724 A lessor may rescind the contract under any of the following circumstances if the leased object cannot be used due to a reason not a ributable to the lessee: (1) the leased object is seized or detained by the judicial authority or administra ve authority in accordance with law; (2) there are disputes over the a ribu on of rights of the leased object; or (3) the leased object violates mandatory provisions of laws and administra ve regula ons in respect of the condi ons for use thereof. Ar cle 725 A change in the ownership of a leased object during the period that a lessee possesses the leased object in accordance with the lease contract shall not a ect the validity of the lease contract. Ar cle 726 A lessor intending to sell a leased house shall no fy the lessee within a reasonable period of me prior to the sale, and the lessee shall have the priority right to purchase the house under equivalent condi ons, unless the person who is a co-owner by share exercises his priority right to purchase the house or if the lessor sells it to his close rela ves. Where a lessee fails to explicitly express his inten on to purchase the house within een days a er the lessor has ful lled his obliga on of no ca on, the lessee shall be deemed to have waived such priority right. Ar cle 727 Where a lessor authorizes an auc oneer to sell the leased house through auc on, he shall no fy the lessee ve days prior to the auc on. The lessee shall be deemed to have waived his priority right to purchase it if he fails to par cipate in the auc on. Ar cle 728 Where a lessor fails to no fy the lessee or otherwise hinders the lessee from exercising his priority right to purchase the leased house, the lessee may request the lessor to bear the liability for compensa on, except that the validity of the contract for sale of the leased house concluded between the lessor and a third person shall not be a ected. Ar cle 729 Where a leased object is par ally or wholly destructed, damaged, or lost for a cause not a ributable to the lessee, the lessee may request a reduc on or exemp on of the rent; and the lessee may rescind the contract if the purpose of the contract is unable to be achieved owing to such destruc on, damage, or loss. Ar cle 730 Where there is no agreement between the par es on the term of the lease, or the agreement is unclear, if it cannot be determined according to the provisions of Ar cle 510 of this Code, the lease shall be deemed a lease with an inde nite term. Either party may rescind the contract at any me, provided that the other party shall be no ed within a reasonable period of me in advance. Ar cle 731 Where a leased object endangers a lessee's safety or health, the lessee may rescind the contract at any me, even if the lessee is clearly aware of the substandard quality of the leased object upon concluding the contract. Ar cle 732 Where a lessee dies within the term of lease of a leased house, a person who lives with or the joint operator of the deceased may lease the house according to the original lease contract. Ar cle 733 A lessee shall return the leased object upon expira on of the term of the lease. The leased object returned shall be maintained in its a er-use state in accordance with the agreement or in line with its nature. Ar cle 734 Where a lessee con nues to use the leased object a er the expira on of the term of the lease and the lessor has not raised any objec on, the original lease contract shall con nue to be valid, except that the lease term shall become un xed. Upon expira on of the lease, a lessee of the house has the priority right to lease it under equivalent condi ons. ti ti ti ft ti ti ft ti fi ti ti ti ti ti ti ft ti ti ti ti ti ff ti ti ti ti ti fi ff ti ti ti tt ti ft ti ti tt ti fi ti fi ti fi ti fi ti fi ti ti ti ti ti ti ti ti ti ti ti ti ti ti ti ti tt 79