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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.他们或献计献策，或指点时弊。CS1, …黎水欢喜地四处打量，对帐篷内的布置十分满意。在第一部电影《观景楼》中，一名年轻女子在光天化日之下被发现死在巴斯最美丽、人口最多的公园之一的躺椅上。为什么这个女人面带微笑地死去？　　电视剧《李克农》由中央电视台中国电视剧制作中心和国家安全部国安影视中心联合拍摄，以李克农同志一生的战斗经历和传奇故事为主线，讴歌了他和成千上万隐蔽战线工作人员的丰功伟绩。