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　　武梅抽丝剥茧耐心侦察，终于迫使“钓鱼The fifth step is to write the implementation of each state class. It is worth noting that StateFactory is used to avoid the problems caused by the absence of abstract classes in javascript.六年前，首尔发生了一宗甚多疑点的枪战，来自不同组织的两个特工宋知元（姜东元饰）和李汉奎（宋康昊饰）同时执行任务，，但因案件没有结局宋知元被国政院强行辞退，而李汉奎也被自己的组织以无故罪名抛弃。那次枪战是二人的首次碰面，不过只是擦肩而过。 六年后，偶尔相遇的这两个热血男子惺惺相识，因各怀心中要追寻的案件，只能对对方隐瞒真实的身份而以朋友方式相处，正在他们结下深刻友情时，知元发觉6年前的那天，汉奎也同时出现过在案发现场并且身份不明，二人的人生开始了新的一幕...该节目是为纪念哈利波特影片开始上映20周年，包括铁三角等多名演员将重聚特别节目，一起回忆哈利波特的故事。接着，他们问园门口值守的婆子，可看见五少爷出去了。One problem with the factory method pattern is that the creation of the class depends on the factory class, that is to say, if you want to expand the program, you must modify the factory class, which violates the closure principle. Therefore, from the design point of view, there are certain problems, how to solve them? We use the abstract factory mode to create multiple factory classes, so that once new functions need to be added, we can directly add new factory classes without modifying the previous code. Because the abstract factory is not very easy to understand, let's look at the diagram first, and then it is easier to understand with the code.