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A4.1. Visual function examination.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.我不是故意的，我真的放不下你。There was a pair of socks in Xiaoyu's house that I liked very much before, but it broke after wearing it for one day. I wanted to buy another pair, but I didn't sell it.苏岸带他下去管着，看好。《公主的男人》是一部历史剧，讲述的是朝鲜世祖时代，世祖首阳大君的女儿和将帅金宗瑞的儿子相爱却又无法走到一起的爱情悲剧故事。1453年10月，首阳大君发动政变，史称“癸酉靖难”，金宗瑞便是在此次政变当中遭到了首阳大君的毒手，因此他们的后代金承俞与世玲之间的爱情故事，就宛如是“韩剧版的《罗密欧与朱丽叶》”。