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Liskov Substitution Principle, LSP (Richter Substitution Principle) means that subclasses must replace their parent types. In other words, in the process of software development, after the subclass replaces the parent class, the behavior of the program is the same. Only when the subclass replaces the parent class and the function of the software is not affected can the parent class be truly reused, and the subclass can also add new behaviors to the parent class. In order to look at an example of violation of LSP principles, the specific code is as follows:好……好……你们有本事，国书都有了。In the summer of 2016, an organization called "Shadow Broker" began to disclose highly confidential information about cyber weapons from the National Security Agency (NSA), including those being actively developed. The National Security Agency still does not know whether the leak came from insiders or whether a foreign force infiltrated the Tailored? Access? Operations) (the department of the National Security Agency responsible for cyber war intelligence gathering).秦淼见他望着自己头上笑，忙问道：葫芦哥哥，这个帽子好不好？我也帮你做一个吧，很容易的。Nikita闯进“组织”盗取黑盒子后踏上了逃亡之路，顺便还带走了Michael；Birkhoff倒向“Nikita”这一方；Alex和Amanda共同执掌新“组织”；“上峰”浮出水面；Percy背后继续操纵守护者。危险升级......　　于是芹泽、纯子和榎本组成了密室案三人组，接二连三阴差阳错地解决了各类密室杀人案，上锁的房间一一被开启。沉默寡言一心研究撬门溜锁的榎本也在一系列的案件中得到了芹泽和纯子的信任和喜爱，而榎本的背后似乎掩埋着什么不可告人的秘密？何美好，美藉華人，人稱「好姐」。54歲的好姐保養得宜，祟尚自然，在國外生活經常被誤以為是三十出頭、秀色可餐的待嫁中女。一年前，好姐丈夫因病離世後，懷疑自己患上雙重人格症，內心經常出現黑暗面，自我掙扎矛盾；隻身在外的好姐不甘寂寞，毅然回港定居，希望跟女兒互相照應，也希望對病情有所改善。