About an American Chinese professor. Ten years after the end of WG, our country began to reform and open up, and wanted to send a group of students to the United States to study new science and technology. But at that time, the GRE and TOEFL standard exams had not yet started in China, so American universities were full of misgivings when recruiting students from China. Simply put, they refused to accept them.

The Chinese professor wrote a letter to Fang Yi, the then Vice Premier, suggesting that some good universities in the United States should be linked to hold a standard examination in China every year, and students should be selected to go to the United States for further study according to the examination results. After receiving a positive reply (which was later strongly supported by Comrade Xiaoping), the professor wrote to the physics departments of 53 universities in the United States to invite them to participate in this project, and asked the universities to waive the application fee, because it was impossible for China students to exchange foreign exchange at that time. Under difficult circumstances, he convinced his American colleagues and friends again and again that the project finally succeeded and lasted for ten years. Is the famous CUSPEA project. This project has trained a large number of physics backbones for China, and extended to chemistry and biology. In 1985, the professor also helped China to design a postdoctoral system in line with China's national conditions. He actively promoted the establishment of China's natural science fund and introduced peer review into the distribution system of scientific research funds.

This professor has also promoted the construction of many physics research centers in China. In addition, there are university entrance scholarships for outstanding high school students in China and "Junzheng Scholarships" to promote cross-strait undergraduate research exchanges. This professor is a Nobel Prize winner, and his name is Li Zhengdao. If you still know his story, but don't know the details, there may not be so many people who know the following story. If you don't hear it from the witnesses, I won't believe it at all.

This Chinese professor is also a Nobel Prize winner. In the twenty years from 1979 to 1999, after the end of the WG, he went back to China almost every time to help the establishment and development of disciplines in mainland molecular reaction dynamics. This is almost a process from scratch. From the beginning, he provided the design drawings of the instrument to the laboratory in mainland China to help build the instrument, and then he personally debugged the instrument for several days without sleep (he had won the Nobel Prize at that time). Later, when he found that it was not enough to have instruments alone, he excavated young people from the mainland to go to the United States for further study, trained them from scratch, and sent them to receive relevant instrument design training. Through decades, he built an internationally advanced molecular reaction dynamics laboratory in China. His students have become our teachers again, continuing to train a new generation of physical and chemical technicians in China. But the professor's story was lost in the years. Why? Because he returned to the place where he was born after 1999, some of his later words and deeds were also controversial.

Because, as other respondents said, patriotism is layered and circled, and his growth and background determine his position. This position may be opposite to ours. The country he loves may only be the outermost circle, but the academic contribution of his mainland is indelible and irreplaceable. Even without publicity, it will be passed down by word of mouth. Why do I tell these two stories? I just want to say that the patriotism of overseas Chinese is not as empty talk as everyone thinks. Sometimes their efforts and contributions are not witnessed, and there is no way to imagine them at all. With the development of all walks of life in China today, in many cases, the contribution of overseas Chinese is irreplaceable, and I know far more than these two stories.

However, for various understandable reasons, most of these contributions are not publicized and cannot be publicized by the state. In many cases, they don't want to publicize themselves. But as long as they hear "overseas Chinese" in the Spring Festival Evening, they feel enough. Maybe we will meet some Chinese who are not so good because of their livelihood outside, but what kind of people we should remember and what kind of people we want to be is the most important thing, isn't it?