Where is the center of the world?

The students were silent for a while. After about five minutes, Director Li of the Finance Department spoke first: The earth is spherical. Geographically, there should be no center. I think it can be divided by industry. If we take the financial economy as an example, Then Manhattan, new york, USA can be called the world financial center. Then Director Lu of the Education Department stood up and said: I think Oxford, Cambridge, Massachusetts and Harvard in the United States can all become the centers of the world education industry. Then Director Zhang of the Culture Department replied firmly: If Vienna, Austria is undoubtedly the center of the world in terms of music art, and Paris, France is the only one in terms of painting art. When everyone nodded yes to the above students' answers, Director Ding of the National Development and Reform Commission suddenly stood up and said in a tender tone: The center of the world is where my son is. When he said this, everyone was settled, and the classroom became silent again. Even the teacher froze for a while. Director Ding worked in Tibet for three years, and his skin became dark brown like Tibetans. He continued to preach that during his three years in Tibet, he was most sorry for his son. When his son took the college entrance examination, Both parents take care of and encourage the children who take the college entrance examination at home, but he is thousands of miles away in Lhasa, and his wife is the only one who takes care of his son. Finally, his son has succeeded in being admitted to a university in northwest China. Originally, others were in Tibet, and his heart was always in this city, which is the center of the world. But once his son was admitted to a university in northwest China, his heart (and his wife's heart) flew to a city in northwest China. In the past, he didn't like a city in northwest China. I thought it was a place with bad environment. Now I regard it as a sacred place, and I care about everything in the city, such as climate, economy, environment, culture, etc. Any change and development there seems to be inextricably linked with him. Obviously, the city has become their new world center. I visited Europe last year and saw the pure and beautiful environment. I thought it would be very happy to live there. But I was soon dispelled by another idea: Europe is no better. Because there are my relatives in the motherland, my center is in the motherland. I watched the "Magic Earth" program on TV the day before yesterday, which was about the process of investigating the cause of the crash of a Swiss Airlines passenger plane six years ago. The plane crashed in a lake in Canada, killing all the people on board. The daughter of a Swiss old man was also killed in the crash. He gave up all his property in Switzerland and left his wife to come to Canada alone. Facing the lake where his daughter died, he opened a small hotel and settled down for a long time. He said that every time he saw the vast lake, he seemed to see his daughter's figure. In fact, he regarded this lake as the center of the world. Moreover, there can be more than one center, where his wife and children are located, and where his parents are located. When Wang Bo was young (14 years old), he traveled all the way to his world center: where his father was sent.