In external relations, the co-owners shall have joint and several rights and obligations arising from the co-owned immovable or movable, unless it is otherwise provided for by any law or a third party knows that the co-owners do not have joint and several rights and obligations; in internal relations among the co-owners, unless it is otherwise agreed upon by the co-owners, the co-owners in divided co-ownership shall have joint and several rights and obligations in proportion to their shares, while the co-owners in undivided ownership shall jointly have rights and obligations. A co-owner in divided ownership that pays the debt in excess of its share has the right to recover the overpaid amount from other co-owners. 因共有的不动产或者动产产生的债权债务，在对外关系上，共有人享有连带债权、承担连带债务，但是法律另有规定或者第三人知道共有人不具有连带债权债务关系的除外；在共有人内部关系上，除共有人另有约定外，按份共有人按照份额享有债权、承担债务，共同共有人共同享有债权、承担债务。 偿还债务超过自己应当承担份额的按份共有人，有权向其他共有人追偿。