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I don't even know you, do I,《远大前程·双龙会》是《远大前程》番外篇，讲述了第四代上海大亨霍震霄（刘昊然饰）与江湖少年陈峥（陈昊饰）在狱中相识，并在各方势力恶斗的复杂环境下，二人从互不待见的冤家，走向合作，共同成长、完成蜕变的热血和勇敢无畏的故事。由《Go Back夫妇》权慧珠编剧执笔，预计接档《爱的迫降》播出。ChildClass.sellBicycle ("mode"); //Print out business operations A and B23岁的女主有了个28岁的爸爸？因为各自需要组成了临时家庭，故事会怎么发展呢？　　上海著名侦探罗桑天经过现场勘查，认为李梦露坠楼下身出血，怀疑李梦露怀孕。与此同时，李梦露家被盗，失踪的病例以及家周围发现的婴儿的裤子，使罗桑天坚定李梦露怀孕的事实。One problem with the factory method pattern is that the creation of the class depends on the factory class, that is to say, if you want to expand the program, you must modify the factory class, which violates the closure principle. Therefore, from the design point of view, there are certain problems, how to solve them? We use the abstract factory mode to create multiple factory classes, so that once new functions need to be added, we can directly add new factory classes without modifying the previous code. Because the abstract factory is not very easy to understand, let's look at the diagram first, and then it is easier to understand with the code.