出让人

Normally, obligor can restitute only from the assignor if the creditor's right assigned doesn't exist or obligor revokes the contract.

与的债权不存在或者债务人解除合同时,债务人通常只能够向债权出人请求返还。

In case both parties agree to let the alienator continuously possess the chattel when the real right of a chattel is alienated, the real right shall go into effect upon the effectiveness of the agreement.

产物权转时，双方又约定由出人继续占有该产的，物权该约定生效时发生效力。