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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.Samples taken with reduced exposure(Update 11.22)由SAG奖提名人Rafe Spall、BAFTA提名人Esther Smith主演，Andy Wolton编剧，《试一试》是一部由苹果电视+和BBC工作室制作的喜剧系列剧，讲述一对三十多岁的夫妇和他们的朋友在学习成长、安顿和寻找爱的人。郑氏也劝住他们几个，一行人跟着张槐逶迤下去地底溶洞，这里，早准备好了几个大大的行囊——终究不能让他们几个只背个小包袱就上路，这可是要进入小青山深处，各类工具、药物等一点都不能少，光盐都有十来斤。一对情侣因为开餐馆意见不合闹出的啼笑皆非的爱情故事……According to the memory of Liu Guangyuan, a soldier who personally participated in the battle that year: