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The Liskov Substitution Principle (LSP) is one of the basic principles of object-oriented design. The Richter substitution principle says that wherever a base class can appear, subclasses can certainly appear. LSP is the cornerstone of inheritance reuse. Only when derivative classes can replace base classes and the functions of software units are not affected can base classes be truly reused, and derivative classes can also add new behaviors to base classes. The Richter substitution principle is a supplement to the "open-close" principle. The key step to realize the "open-close" principle is abstraction. The inheritance relationship between the base class and the subclass is the concrete realization of abstraction, so the Richter substitution principle is the specification of the concrete steps to realize abstraction. --From Baidu豹子头林冲是一个家喻户晓悲情式的英雄，他始终坚持自己的原则即使充满了复仇的怒火也不滥用暴力。他对生活由充满信心到迷茫到再次坚定，在磨炼的过程中他通过亲身的经历和自己的思考来提升自己。他在磨炼中变得逐渐坚强起来，他试图通过自己的奋斗来改变命运。然而他虽然做出一系列的努力但最终还是被奸人所害，他的愿想也就落空了，他的行为也让人感到遗憾和惋惜。本故事避开古装片一贯人物脸谱化的窠臼，通过对一个个人物心理层面的把控和社会层面的分析,达到推动故事发展和深化主题的目的，呈现给观众的是一个有所触动并能引发一定思考的故事　　南清市缉毒大队队长叶其辉收到卧底警员万蕾线报，本市最大毒贩团伙——“幽灵”组织准备倾销存货，潜逃海外，而与其交易的对象则是K国大毒枭巴青。Men's and women's volleyball and beach volleyball respectively.同是警察的黄姜（黄秋生）和七喜（刘青云）情同手足，然而两人行事上却有天壤之别，黄姜刚正不阿，七喜却与黑帮老大盲超（吴镇宇）是结拜兄弟，某次行动中，黄姜迫于无奈将七喜连同盲超击毙，事后也没解释原因，令七喜老婆对其生出误会。十多年后，七喜的儿子（黄浩然）与盲超的儿子阿威（陈小春）长大成人，并各自继承父业分别成了警察和黑帮老大。阿威一直想报父仇，可乐在不了解事情的真相前也有这样的打算，但在知晓事实后，开始为选黑还是选白犯难。We know that for the above code, Xiao Hong subscribes to shoeObj, an object that buys shoes, but if we need to subscribe to buying houses or other objects in the future, we need to copy the above code and change the object code inside again. For this reason, we need to encapsulate the code.在王者峡谷的虚拟世界中，各路英雄纷争四起，每天都是无限循环的战斗。而主角小卤蛋是一个人见人“爱”的峡谷小明星，整个峡谷因为他的存在，每场战斗都会变得欢快搞笑，啼笑皆非，这里只有输赢，还有再来一局！