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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:在悲戚的童年走过来的明浩，守着唯一的姐姐和歌唱的梦想一步步的成长，追求音乐梦想的路上遇到了深爱一生的女人，有了短暂的幸福和快乐。当美好崩塌后，明浩隐瞒姐姐红梅选择了灯红酒绿的生活，在即将堕落深渊的那一刻，他幡然醒悟，游离的人生最终安定的停靠在了亲情和爱情的港湾。带您进入一个到处亮闪闪，充满快乐，偶尔愤怒的欢乐王国。这全新的一季里，我们来跟随Unikitty和她的朋友们进入一个充满惊喜，刺激和派对的世界。上世纪八十年代初，在广州市的麻洋街长大的少年欧小剑从警校生退学后，变成了自甘堕落的小混混，这让与他一起长大的马晓晓很不理解。两人发生争执，然而这一幕被暗恋马晓晓的易东东看到。新搬来的易东东很快和麻洋街的孙隼、梁小宝、曾好、马达达等同龄人打成一团，紧接着一连串的突发事件也让他慢慢和欧小剑、马晓晓有了关联。众人在麻洋街经历了鸡飞狗跳的青葱岁月，也镌刻了独属于他们的青春。随即吩咐道：拉下去，砍了。Aban stayed in China for 15 years and worked for the New York Times for the next 14 years. He started as a reporter in North China and quickly became the chief reporter in China, taking charge of many reporter stations across China. During his stay in China, the Republic of China experienced many great changes. The Beiyang system rose from prosperity to decline, while the Kuomintang rose with the Northern Expedition and unified the whole country. The forces in Europe and the United States have been depressed by the revolution, while the forces in Japan are growing stronger. Roughly speaking, his report covered the revolutionary situation in Guangzhou, the great cause of the Northern Expedition, the change of flag in the Northeast, the Jiang Feng Yan War, the Middle East Road War, the Jinan Massacre, the September 18 Incident, the Xi'an Incident... until the last moment of the isolated island era in Shanghai. It can be said that every ups and downs and wrinkles in China's history over the past ten years have been transmitted to the New York Times through his keyboard, to the American public and the global public, and to the political decisions and diplomatic strategies of various countries.