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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.　一个从小被誉为商界魔童，酷炫吊炸天的80后霸总VS一个浑身是戏的00后鬼马女孩。差异巨大的二人，却因为一场誓星的来临，而改变了人生轨迹，爱上了彼此，在变幻的时空中，领悟爱之天意。四进院上房西屋，红椒姊妹几个正跟二婶曹氏学刺绣。Sourceable obj = new Decorator (source);Liskov Substitution Principle, LSP (Richter Substitution Principle) means that subclasses must replace their parent types. In other words, in the process of software development, after the subclass replaces the parent class, the behavior of the program is the same. Only when the subclass replaces the parent class and the function of the software is not affected can the parent class be truly reused, and the subclass can also add new behaviors to the parent class. In order to look at an example of violation of LSP principles, the specific code is as follows: