In June 1933 Han Chao-Tsung applied for a reentry permit so he could return to the United States after a one-year trip to China to visit family. He presented his Section 6 student exemption certificate issued to him in Manila, Philippine Islands in 1923. He was born on 6 June 1903 at Hwon Shui Village, Meng Tsing Honan, China and had lived in the United States continuously since his arrival in San Francisco on 11 September 1923 from Manila. He attended the University of Illinois from 1923 to 1927. In 1933 Han Chao-Tsung was working as a metallurgical research engineer for Illinois Steel Company in Chicago, Illinois.
Han Chao-Tsung was married to Elevina Pechon, a French woman, born in Lille, France. They were married on 10 April 1928 in Waukegan, Illinois and had a son, Pierre Han, born on 12 July 1929. The three of them were traveling together to China.