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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.我要告诉你，你的想法，我和戚将军都是认同的，你比我们都要厉害。文革末期，未婚先孕的知青顾家慧与农妇凤姑同日生下一女，接生的竟是一兽医即为凤姑丈夫陈金鹏。家慧产后即逝，凤姑因家慧托孤之请，乞讨至沪，送孤女予顾母，奈何顾母身临险境，拒认自家骨肉。雨过天晴，顾家劫后余生，重振门庭。顾母到山村亲迎外孙女回家，不料，善良的凤姑一念之差却予调包。事后，她又深感内疚，再到上海欲换回生女，然而，却反被顾家误会，大错铸成。两个女孩的命运由此别如天壤。引发出一连串扑朔迷离，悬疑诡谲的故事。接着又扯些家常里短的话，老是把小葱和秋儿比较。含含糊糊是措辞。将军凌不疑（吴磊 饰）大捷归来，在追查旧案的过程中结识了被罚在乡野“思过”的留守儿童程少商（赵露思 饰），只此一眼，便是万年。背负血海深仇的凌不疑与自幼缺爱的程少商，互相吸引也彼此刺伤，在一次次共赴生死后，他们认清了彼此的感情，相互治愈、用爱消融仇恨。同时二人也在这些经历中各自变化成长，慢慢与自己和过去和解，并坚守内心的正义，携手化解国家危机，成就一段佳话。该剧由关心则乱小说《星汉灿烂，幸甚至哉》改编。We are the builders of the future of the society, so we should use our hearts to walk out of the ivory tower and go into the society to understand the national conditions and serve the society. The social practice of "three rural areas" in summer is an effective way to let us know the society, serve the society and exercise ourselves. This social practice of "three rural areas" has enabled me to understand my social position, define my mission on my shoulders, and further stimulate my enthusiasm for learning. I deeply realize that teachers are role models for students, and our words and deeds are seen by students. Therefore, while teaching students, we should also strive to improve our comprehensive quality. At the same time, I also deeply realize that teachers should not only preach, teach and dispel doubts, but also guide students to establish correct learning attitude and correct outlook on life, world outlook and values. This summer's social practice has not only cultivated our potential to apply theory to practice and the spirit of teamwork, honed our strong will, but also realized the goal of "serving the society and exercising to become a useful person" in the process of social practice. I remember someone once said: whether a graduate is a talented person or not depends on his academic qualifications and social practical experience. Because theoretical knowledge alone is far from enough, without any potential for social practice, one cannot connect with the rapidly developing society. So there was this dragon neck trip.