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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:Senior investigative reporter Cao Linhua once shared that if reporters want to collect news that others cannot collect, they must learn to use various resources and contact various clues to achieve the purpose of the interview. If necessary, you may need to be an actor. He once played the role of the child's uncle and disguised himself as a street fighter in order to get to the truth of the news in front of others. He was also misunderstood as a gangster by the driver master because he reached a late-night escape from tracking. However, in order to obtain news facts, the performance still needs to be performed.Differences between simple factories and factory methods: Simple factories and factory method patterns look very similar, especially specific factories in simple factories and factory methods. Simple factory, all things have been done in one place. However, the factory method creates a framework for subclasses to decide how to implement it. For example, in the factory method, the OrderPizza method creates a general framework to create pizza. The OrderPizza method relies on the factory method to create specific classes and make actual pizza. It is possible to decide what the actual products manufactured are by inheriting the factory. Simple factories do not have this flexibility.他和黄豆身在官场，考虑得比旁人更多一些。Death Rift Victory!黄豆盯着戴帷帽的黄夫人好奇地打量，忽然开口问道：咋女人在这边瞧病哩？小葱姐姐那边不是有专门的地方给女人瞧病么？板栗瞪了他一眼道：陈爷爷医术高明，名声远播，人当然乐意来找他了。刘邦越是这样说，韩信的心中却越是忐忑不安。