都江堰青城山镇人刘兵迁居到温江,因无法赡养母亲,便和妹妹刘凤签订了一份《关于转让房屋及赡养老人的协议》。协议约定:刘兵将自己的房产转让给妹妹刘凤,由妹妹负责供养母亲,其母对此表示同意。此后,刘兵就将房屋交给了妹妹,而刘凤也依约独自承担起赡养母亲的义务。后来,刘凤 Liu Bing, a native of Qingcheng Town, Dujiangyan, relocated to Wenjiang County for signing an agreement on the transfer of housing and the maintenance of the elderly because he could not support his mother. Agreement: Liu Bing will own property transferred to his sister Liu Feng, the sister is responsible for supporting the mother, his mother agreed. Since then, Liu Bing will give the house to his sister, and Liu Feng also alone according to contract to take care of her mother’s obligations. Later, Liu Feng