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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:全国解放前夕，蒋介石特聘美国情报专家在贵州息烽培训了183名特工“精英”，派往东北地区潜伏，备有朝一日“反攻大陆”之用。录有183名特工名单的“特遣图”随着特务头子贾义昌与他“六姨太”的神秘死亡而销声匿迹，成了一个不解之谜……< span data-role= "jmp" data-params= "{'options': {'type ': 'jmp_table', 'template ':' $jmp_table ', 'content': {'txt ':'(1) In the most visible place, the vertical two ring lights illuminate red lights;性格活泼，爱好文学的高一女生陈澄，阴差阳错加入学校无人问津的文学社团，认识了古灵精怪的小舞和脾气大于本事的叶洛，在准备重振旗鼓之时，学校准备让文学社社报《絮语报》停刊，教导主任贾老师认为报纸已经面临淘汰，《絮语报》没有再办下去的必要。陈澄、叶洛与小舞三人历经挫折，为了学校保送名额而放弃文学社的前任社长张柏熙默默的在背后给予帮助，成功做出了《絮语报》的第一百期纪念刊，得到了全校师生的认同，絮语报虽然停刊，但是报纸和梦想在所有人心里生根发芽。Let's go to Novice Village and have a try. .