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User class unified interface, User1 and User2 are different objects respectively, and they are related. If the mediator mode is not adopted, the two need to hold references to each other, so the coupling degree between the two is very high. In order to decouple, the Mediator class is introduced to provide unified interface, and MyMediator is its implementation class, which holds instances of User1 and User2 to control User1 and User2. In this way, User1 and User2 objects are independent of each other. They only need to maintain a good relationship with the Mediator, and the rest is maintained by the MyMediator class! Basic implementation:27Responsibility chain mode-A request needs multiple objects to process, thus avoiding the coupling relationship between the sender and receiver of the request. Connect these objects into a chain and pass the request along this chain until an object processes it. The specific structure diagram is as follows:婚后就到深圳各自奋斗的林吟风黎佳夫妻二人，由于生活不和，早已离婚，且分别有了新的情人，然而身为心理医生的黎佳由于担心二人离婚影响到在老家读小学的儿子林栋的学业，一直隐瞒着林栋。这个暑假，林栋没有告诉任何人，突然来到深圳，夫妻二人只好联合起来在儿子面前编织一个二人仍然美满的谎言，却引来错漏百出。　　林栋在路上认识了聪慧小女孩石小清，石小清父亲石云上早就和其母离婚，在深圳已经再婚，如今石小清母亲要出国，只好把石小清送来石云上处，表面可爱懂事的石小清私下里对后母罗珊却阴狠非常，因为石小清始终希望靠自己的力量挽回父母的婚姻。 　　在石小清的帮助下，林栋逐渐发现父母的不正常，二人互相协力，希望挽救各自的家庭，这个暑假，孩子和父母们，都在经历一场特别的旅程………7. Do not know how to refuse那中年和尚也停止推磨，过来帮忙。Announce the Admission Control Score Line for Special Categories before the Specialty Batch