 His brother Ting-Kai Li (, 1934–November 18, 2018) was a prominent medical scientist and served as the director of the National Institute on Alcohol Abuse and Alcoholism (NIAAA) between 2002 and 2008.His brother-in-law, Sherman Wu, was an activist and academic at Northwestern University.He died on December 27, 2012 in Snowbird, Utah.