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Code as above; Write three functions of order500, order200 and orderNormal respectively, and process their own business logic in the functions respectively. If their own functions cannot be processed, they will return the string nextSuccessor to pass it back, then encapsulate the constructor Chain, pass an object fn into it, and have their own attribute Successor. There are two methods setNextSuccessor and passRequest on the prototype. The method setNextSuccessor specifies the order of nodes in the responsibility chain, and saves the corresponding method to the attribute this.Successor, chainOrder500. SetNextSuccessor (chainOrder200); ChainOrder200. SetNextSuccessor (chainOrderNormal); Specifies the order in the chain, so this.Successor references the order200 method and the orderNormal method, so if chainOrder500.passRequest (1, true, 500) is called for the first time, the order500 method is called, output directly, and chainOrder500.passRequ is called for the second time.1948年6月的中国，解放战争呈现胶着状态，中国在两种不同命运、两种不同前途之间摇摆。Unicom　　由于土匪作战的游击特性，军分区领导决定由少剑波组建一支精干的小分队深入林海雪原追剿土匪，并要求他们寻找一张标有牡丹江地区潜伏特务分布情况的地下联络图。　　此剧为韩国tvN于2017年12月9日起播出的周末剧，由洪忠灿导演与卢熙京作家继《我亲爱的朋友们》之后再度合作，改编自卢熙京的原著小说。2011年曾拍摄电影版。该剧讲述一群比坏家伙们更坏的人，然而就是这样一群人，却用专属于他们自己的手段为社会除暴安良。