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1949年5月25日,在中华人民共和国诞生前5个月,上海解放了,这时杨振宁还在芝加哥大学,正是想到普林斯顿高等研究所去的时候,这时他十分牵挂上海的家人。犹豫了好几天之后,他终于认为自己有权和父母取得联系并探询
On May 25, 1949, five months before the founding of the People’s Republic of China, Shanghai was liberated. At this time, Yang Zhenning was still at the University of Chicago. It was when he thought of Princeton Institute of Advanced Studies that he was very concerned about his family in Shanghai. After hesitating for several days, he finally thought he had the right to contact and probe with his parents