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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:师傅，我们去……陈启报了一家高档饭店的名字。《变形计第十八季 会员Plus版》是由芒果TV独家自制的青春励志生活类体验纪实节目《变形计第十八季》的未播花絮版，包含更多正片外的精彩内容。在新一季节目中，记录城市少年与农村少年的互换人生，他们将感受对方的故事，共同完成心路转变。For the current Windows 2000/XP/2003 operating system, the stability of the system itself is no longer a problem, but a large number of drivers and application programs are the main culprit that endangers the stability and reliability of the system. It may have worked very normally, but one day the system could not start normally after upgrading a video card driver with a Bug or installing a new version of antivirus software. In order to solve such problems that will affect the normal operation of Windows but are not Windows' own problems, Microsoft has prepared a safe mode for this purpose.说起这事她就生气，暗自庆幸：亏得生疏了，而且公婆都站在自己一边，不然的话，那些人要帮槐子纳妾，自己可不就傻眼了。The investors are also very sympathetic when they see those investors stepping on thunder. However, stepping on thunder does not mean that money is gone. What can investors do?Allows an object to change its behavior when its internal state changes. Object appears to have modified its class.