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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:First do inter-provincial transfer. From the first semester to the second semester to the second semester. It is not possible to finish the senior high school entrance examination.Wuli Bridge几位大夫这才恍然，纷纷关切地嘱咐林聪，一定要好生歇息，余下的事他们会帮着张罗。可惜这一切都因为尹旭的出现而化为泡影，而今美人儿还可能被他劫走了。Top weightlifting shoes. Prices are generally above 200 yuan. The most expensive is over 400 dollars. These are basically only seen by players at the national or regional team level.