[5] Zung taught mathematics at her alma mater, the McTyeire School, for nine years.
She was based in the United States from 1936 to 1946, working in various private and government positions, including for the Office of Strategic Services during World War II.
Zung wrote a comedic play, Two Too Many (1939),[6] and, with Peking opera artist Mei Lanfang, Secrets of the Chinese drama: A complete explanatory guide to actions and symbols as seen in the performance of Chinese dramas (1937, 1964).
[7][8] In 1942 she was a guest lecturer at Mills College, and spoke to a meeting of AAUW members in Sacramento, California, about "The Legal Status of Chinese Women, Old versus New".
[11][12][13] The Chinese Communist Revolution prevented her return to Shanghai in 1949, so she settled in New York City.