You should know Li Zhengdao and Yang Zhenning. As the first author of parity non-conservation, why is Li Zhengdao less famous than Yang Zhenning, the second author? Just because Li Zhengdao's article was published too early, there are still many imperfections.

However, in many papers jointly published by Li Zhengdao and Yang Zhenning, Yang Zhenning's name is in front of Li Zhengdao. According to later records, this was put forward by Yang Zhenning. His reason is that he is several years older than Li Zhengdao, and according to China's practice, he should be ahead.

Why is Yang Zhenning famous? In China, this is obviously because of his social activities and contributions. Although Li Zhengdao and Yang Zhenning were the first scholars to return to China in the early days, they later maintained similar relations with China. However, in his later years, Yang Zhenning shifted the focus of his life and work to China, making great contributions to the cultivation and introduction of domestic academic talents.

But Yang Zhenning's scientific contribution is not enough to gain great social influence. Yang Zhenning is famous because he is an outstanding social activist. Academician Huatong believes that Yang Zhenning is the most powerful diplomat in China and has made great contributions to promoting the diplomatic cause of friendship between China and foreign countries. For example, Yang Zhenning returned to China frequently at 197 1, which was an "ice-breaking trip" and made a sensation all over the world. Since then, a large number of marine surgeons have begun to return home. After returning to China, Yang Zhenning gave more than 70 speeches in American universities, and said a lot of good words to China, which clarified many misunderstandings about us.

Yang Zhenning is also the founder and the first president of the American-Chinese Association. In 1970s and 1980s, the Association led millions of China people to actively participate in and promote Sino-US cooperation, which had a wide influence. As the founder and president, Yang Zhenning has published full-page articles in famous American newspapers many times, demanding that the US government attach importance to its relations with China, give up confrontation and take the road of cooperation. He also urged the President to put Huajian on the agenda as soon as possible. During Deng Xiaoping's visit to the United States, Yang Zhenning personally organized a reception for more than 800 people. He gave his first speech at the welcome banquet.