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弟妹……我去忙了。南瓜道：大伯父大伯母放心，我们会看着他的。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.袁成美、欧阳挂居、季星华、瞿守治、赵松岗5人因为高三补习班而结缘，成为好友并在大学期间成立了“明日会”，从他们的校园生活，到踏入社会，各人之间都被一段错综复杂的爱情牵引。挂居与成美一开始便喜欢对方了，但挂居一直觉得自己亏欠前女友而无法跟成美进一步发展。而默默在成美身边守护的守治成为了成美倾诉心情的对象，性格开朗的守治常常制造浪漫气氛逗成美开心。终于，挂居与成美还是相爱了，但因为生长环境的不同，价值观的差异使两人分分合合。守治虽然深爱成美，但他知道成美真心爱着的是挂居，于是主动退出了竞争，继续默默守护成美。再抬头找刚才那个孩子时，早不见了，连那婆子也不见了。