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Results:Factory method pattern refers to defining a factory interface that creates an object. Its subclasses determine the classes to instantiate and postpone the actual creation to the subclasses. It emphasizes the change of "single object". The main points of its implementation include:Under the column "Xi Jinping's Footprint" are two interactive maps at home and abroad. Readers can see the places Xi Jinping has visited since the 18th National Congress of the CPC by moving the mouse. If you click on Hainan Island, you can see that Xi Jinping has been to Haikou, Sanya and Qionghai. There are as many as 34 news items about his activities in Qionghai, because the host of Boao Forum for Asia is in Qionghai. In addition to attending this forum many times, he also met with leaders of many countries and international organizations during the forum.(未完待续……) show_style();。I. Collision Inspection of BIM Technology in Metro Station Comprehensive Pipelines小馨，你可不要客气，这家伙可是土豪，一个影视改编权就能卖几百万，看得你老哥都想去写小说了。