In the autumn of 1945, the U.S. military revealed that the United States could accept the Chinese learning to make atomic bombs.

Chiang Kai-shek ordered the military and political ministers Chen Cheng and Yu Dawei to be jointly responsible for secretly planning this major national defense science and technology plan.

Chen Cheng and Yu Dawei made an appointment with Wu Dayou, Hua Luogeng, and Zeng Zhaolun, and they selected two young scholars in the three disciplines of physics, mathematics, and chemistry as assistants to go to the United States for investigation and study.

A few months later, in physics, Wu Dayou selected teaching assistant Zhu Guangya and sophomore student Li Zhengdao; in mathematics, Hua Luogeng selected Sun Benwang (and Xu Xianxiu after arriving in the United States); in chemistry, Zeng Zhaohuan selected Tang Aoqing and Wang Ruiqing.

Among the five, Li Zhengdao is the youngest at 19 years old, followed by Zhu Guangya at 21 years old.

Both of them are extremely intelligent and about the same age. They often compete together and have a deep friendship.

In September 1946, several people led by Hua Luogeng set foot on the land of the United States of America and met Zeng Zhaolun who came first.

Because the United States has a technological blockade on this high-tech field, Zeng Zhaohuan shook his head when he met them: "Hey, there is no way to learn atomic bomb technology in the United States. You can go your own way." Zeng Zhaohuan will

He briefly talked about his negotiations and contacts with the Americans these days, and several people felt very helpless upon hearing this.

Everyone has seen that it is impossible for the United States to help China develop an atomic bomb.

In addition, because the Kuomintang government was busy fighting the civil war, corruption was endemic, and the political and economic situation was in chaos, the original goal of establishing a national defense scientific research institution was destined to be a failure.

Zhu Guangya chose to stay at the University of Michigan, the alma mater of his teacher, Professor Wu Dayou. While working on theoretical physics projects as Mr. Wu Dayou's assistant, he was studying for a doctorate in the graduate school, studying and researching experimental nuclear physics.

At the University of Michigan, Zhu Guangya studied hard, got all A's in all subjects, and won scholarships for four consecutive years.

Beginning in 1947, he published consecutive papers in the world-famous physics journal "Physical Reviews", leaving his footprints at the forefront of the emerging discipline of nuclear physics and making him famous among Chinese students.

At that time, there were two major organizations for Chinese students and scholars in the United States: the North American Christian Chinese Students Association and the Chinese Scientists Association in the United States.

Zhu Guangya is an active member of these two organizations.

When the news of the founding of New China came, international students in the United States rejoiced and gathered to celebrate.

At this time, whether to return to China to participate in the construction of the motherland, stay in the United States, or go to Taiwan became an important question that every Chinese international student thought about day and night. It was also the central topic of communication among international students at that time.

Zhu Guangya, like many progressive teachers and students, actively encourages everyone to return to serve the country.

Judging from the written records found so far, in November and December 1949, Zhu Guangya, Cao Xihua and others organized several symposiums for Chinese students studying in the United States in the name of the Association for Science and Technology in the United States in Anseong, where the University of Michigan is located.

They introduced the domestic situation, discussed the role of scientific workers in building a new China, and mobilized everyone to "The motherland urgently needs us! I hope everyone will give up."

Personal interests, encourage each other, urge each other, organize and return to the country as soon as possible." They also composed the "Return to the National Anthem" to the tune of the song "Down with the Great Powers", and sang "Don't hesitate, don't hesitate, return to the country" at every gathering.

Go, go back to the country. The construction of the motherland needs you. Get organized and go back to the country. Go back, go back." Zhu Guangya himself had already decided to return to the country and had made all preparations before returning.

Starting from the end of 1949, Zhu Guangya, as the chairman of the Midwestern Chapter of the North American Christian Chinese Student Association, took the lead in organizing the drafting of "An Open Letter to Students Studying in the United States" and sent it to Chinese students studying in the United States for circulation, discussion, and joint signatures. By the second

In late February of this year, 52 overseas students who had decided to return to China in the near future signed their names.

Some of them are engaged in natural sciences and social sciences (such as Comrade Chen Xiuxia, who returned to China at the end of 1949 and later worked in the Ministry of Foreign Affairs), and they are distributed throughout the United States. For example, the famous scientist Mr. Hou Xianglin was working in Boston on the east coast of the United States at that time.

Provincial Polytechnic.

This also shows that Comrade Zhu Guangya had great influence among international students at that time.

This open letter was sent to the International Students News Agency in New York on February 27, 1950, and was published in the eighth issue of the third volume of the "Students in America Newsletter" published on March 18. It aroused strong feelings among overseas Chinese students and scholars at that time.

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