Professor Xie is a biophysical chemist. He is Director of Changping National Laboratory, Lee Shau Kee Chair Professor at Peking University, and also Dean of the Faculty of Sciences. He was the first scholar from mainland China since the reform and opening‑up to become a tenured professor (1998) and then an endowed chair professor (2009) at Harvard University. In 2018, he returned full‑time to his alma mater, Peking University. His team’s single‑cell genomics research significantly improved the precision of preimplantation genetic testing, enabling over 10,000 couples with monogenic disorders to have children free of disease‑causing mutations. During the COVID‑19 pandemic, his team used single‑cell genomics and other technologies to develop potent neutralizing antibody drugs, which have to date remained unescaped by any viral variant. Xie is a member of the Chinese Academy of Sciences and a foreign associate of the U.S. National Academy of Sciences, National Academy of Medicine, and American Academy of Arts and Sciences. He has received numerous international awards, including the Albany Prize in Medicine and Biomedical Research, the Peter Debye Award in Physical Chemistry from the American Chemical Society, the Zhongguancun Outstanding Contribution Award, and the Tengchong Science Grand Prize.