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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:板栗笑道：能有啥东西？这时候是冬天，蛇也睡了，乌龟也睡了，还能有啥东西。　　陈秀出身贫寒、父亲早逝，她跟母亲一样都是普通工厂职工，家里还有一名弟弟，从小患有聋哑症，智力稍微偏低，陈秀一直孜孜不倦的教导弟弟怎么学习自立。失踪八年的刘子光（陈伟霆 饰）突然出现在故乡江北市，丧失记忆的他却发现自己有了异于常人的体魄和能力。在一次营救被劫儿童的事件中，被女警胡蓉（马思纯 饰）当成嫌疑人物盯上。「即使被说恶心,即使被嫌烦,依然用所有生命喜欢你」高中生.平良沉默寡言,位于班上阶级最底层。这样的他却对班上最受欢迎的清居一见锺情,深陷恋情之中。清居不与谁特别交好,对任何人均平等而冷酷,堪称君临全班之王者──平良只能在诸如张罗午餐的跑腿事务上竭尽忠诚,盼求清居留意自己！？待那份对唯一君主的信仰化为欲望之时──跨越班级阶层之爱将何去何从！？At the end of the day, What had been piled up was much like a hill bag. Grenades, mines and explosive cartridges, I can't believe it's almost bottomed out. It hit three strange things closest to us. At that time, I remember that the visual straight distance was less than 10 meters. Two of them are just dog-like monsters, Another one is just the one covered in "blood bubbles", I thought I'd be done by killing them, Unexpectedly, after killing two dog-like monsters, The one with the "blood bubble" jumped up and jumped into the air, About less than 2 meters high, Then those "blood bubbles" on the body exploded in the air, Its body was also shattered in the explosion, Then a lot of sticky purple liquid spilled out of the blood bubble and its body. These liquids are all over the place, Then the smell grew stronger, At that time, I was exactly sure that the smell was emitted from this liquid. If it was only bad smell, it would be all right. What was more terrible was that it had serious consequences on the skin. I remember a soldier named Jiang Yong, because he was closest to it, he was caught on his left small arm by a liquid.Residents! Can we still stand by and watch? Can it still be irrelevant? Can we remain indifferent? !