In 1947, she studied at Cornell University in the U.S. where, she met and married Guo Yonghuai who became later one of the founding fathers of China's nuclear bomb.

She organized more than 600 weekend lectures given by notable scholars from many horizons, including economist Li Yining from Peking University and historian Zi Zhongyun from Chinese Academy of Social Sciences.

US$90,000)[6] to her university, to the aid of victims of natural disasters, to the education for special needs children and to the conservation of traditional performing arts.

In an editorial appeared on the day after, a liberal-oriented newspaper China Youth Daily wondered, whether "Li Pei had taken away with her life an age".

[9] According to the official obituary released by the University of Chinese Academy of Sciences, Li dedicated her life to the education of groups of brilliant young people.