A co-owner in divided co-ownership that transfers its share of a co-owned immovable or movable shall notify other co-owners of the conditions for transfer in a timely manner. Where two or more other co-owners claim the exercise of the preemptive right, they shall determine their respective purchase ratio through consultation; if such consultation fails, they shall exercise the preemptive right in proportion to their respective shares at the time of transfer. 按份共有人转让其享有的共有的不动产或者动产份额的，应当将转让条件及时通知其他共有人。 两个以上其他共有人主张行使优先购买权的，协商确定各自的购买比例；协商不成的，按照转让时各自的共有份额比例行使优先购买权。 Where the co-owners fail to agree that the co-owned immovable or movable is subject to divided co-ownership or undivided co-ownership. 共有人对共有的不动产或者动产没有约定为按份共有或者共同共有。