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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.　　LIONS车队外有强大的对手宋杰，内有亟需解决的误会与冲突。在激战的赛场上，他们重新找回初心，再次叱咤风云。　　霍尔斯特德兄弟俩终于团聚，“他们都很开心见到彼此，”奥尔林斯特德说。“瑞恩此番来到芝加哥并不是为了投奔杰，而是来找杰帮忙处理一些事情。”/boggle (hesitation)樊哙，你带着刘盈和鲁元突围出找周勃将军把。Y市，某集团公司老板林树在地下黑帮威逼利之下欠下巨额赌债，决定铤而走险，到赌埤是行最后一博，可是赌运不佳，遭遇老千强哥暗算，更在赌场　林树的神秘失踪，林家老太太，其妻刘爱兰、女儿林佳宜艰难度日，地下赌庄的六子亦步步进逼。眼看林家经营的百年面店危在旦夕，而女儿林家宜又不幸患上重症，生死垂危…… 林树决定孤身暗中调查地下赌场，待罪之身又不敢向公安部门报案；黑道老大辉哥：为了报复林树杀死强哥，辉哥利用六子威胁林家，交出祖屋……林树混迹地下赌场之内，暗中寻找强哥死亡真相，在六子的配合下，设计将辉哥骗到面馆……如此看来，在番邑境内，自己严于律己，吴芮应该不会太过为难自己。