Harvard University statistician Liu Jun has left the United States after 25 years to return to China, saying his decision was motivated by a passion for scientific research and education.
Liu, recognized as one of the world’s leading statisticians, was elected earlier this year to the U.S. National Academy of Sciences for his “distinguished and continuing achievements in original research.” The academy advises the federal government on science, engineering, and health policy.
At a welcome ceremony at Tsinghua University, Liu said his move was guided by “a love for education and scientific research, as well as a sense of patriotism.” Tsinghua recently established a new Department of Statistics and Data Science on July 10, where Liu will now contribute.
Liu’s interest in mathematics began during the late years of China’s Cultural Revolution, a period he described as challenging for pursuing scientific studies. Over the past quarter-century in the United States, he became a prominent figure in statistical research and academia.
His return comes amid increased scrutiny of U.S. universities’ ties to China. In June 2025, President Donald Trump suspended the entry of some foreign students at Harvard, citing national security concerns.
Liu’s departure is seen as a significant shift for the academic community, highlighting growing international mobility among top scientists.
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