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The above is only a model of "Long En" bicycle, If you need to generate other types of bicycles, Other subclasses can be written. The most important advantage of factory mode is that some of the same methods can be implemented. We can write code in the parent class for these same methods. If we need to implement specific business logic, we can rewrite the parent class's methods in the subclass to implement our own business logic. In terms of professional terms, there are two points: First, weaken the coupling between objects and prevent code duplication. Instantiating a class in a method eliminates repetitive code. Second: Repetitive code can be written in the parent class. Subclasses inherit all member attributes and methods of the parent class. Subclasses only focus on implementing their own business logic.郑氏看着这个面容清瘦的少年，竟不知说什么才好，虚应人情用在他身上好像不大恰当，连张老太太也不好意思对他摆脸子。三只聪明且狡猾的老鼠，和一只家犬家犬生活在同一屋檐下，家犬看上去机灵聪明，却总是被这三只小老鼠整蛊，在家犬和三只老鼠你追我赶的日子里，从此有趣、滑稽的故事开始了……是继《猫和老鼠》之后，又一部搞笑之作哦！七月底，板栗化名黎章，秦淼化名黎水，伪装成一对兄弟，来到西南岷州的丰县，在一个小山村落脚。这样无论是打败齐**队，剿灭田荣叛乱，还是对于整个西楚国的声誉与威慑力都是大有好处的。However, this state can be modified.