Kuo Hsin-sung was a graduate in Economics of the Tokyo Imperial University (now the University of Tokyo), Japan, 1924.
Mr. Kuo served as a professor and head of the Department of Economics of the Zhongshan University (or Sun Yat-sen University) in Guangzhou and member of the Financial Readjustment Committee of the Ministry of Finance from 1926 to 1928. He was a counsellor to the Examination Yuan, member of the Examination Committee for the examination of Magistrates in Zhejiang Province, member of the Examination Committee for Higher Civil Service of the National Government.
Kuo Hsin-sung acted as a professor at the Central Political Institute in Nanjing from 1928 till 1930. He was the head of the Department of Economics, later acting principal of the Law School and chief secretary of the National Central University, Nanjing, in 1931. Mr. Kuo served as a director of Department of Higher Education of the Ministry of Education since 1932. Since winter 1932 he held the post of a counsellor to the Ministry of Communications. Later he acted as a Director-General of Posts of the Ministry of Communications.