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Rui Yi interviewed some parents who chose to cultivate their children's thinking ability. One of the parents said, "In fact, our parents don't want to bring academic pressure to their children too early, However, I am afraid that there is no foundation. The gap between children and their classmates will gradually widen after school. With so many children in a class, teachers cannot take care of a certain child alone. We teach ourselves. First, we don't know how to teach and what to teach. Second, we don't have so much time. "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.Click on the green box of "Manaka" (the one-day ticket in the above picture is now updated to the 24-hour subway ticket, see the following subway ticket introduction for details)大臣们可忍不住了，立即有人出面，指出玄武候必须娶青鸾郡主，践行誓言，以免引起南州（原南雀国孔雀城一带）和雪州（原南雀国大雪山一带）臣民的不满。汉军虽然有溃败之势，却不曾真的全部溃退，可能是因为掩护主帅韩信逃走的缘故，一个个全都拼死抵抗，将西楚国的追兵抵挡住。在下就此止步，公主好走。