In June 1948, Jiang Zhongzheng nominated Chang Po-ling as the president of the Examination Yuan，The Control Yuan voted to agree，In July 1948, Chang Po-ling took office in Nanjing. Due to the regulations of the then Ministry of Education (Taiwan), the president of a state university could not hold a part-time job at the same time，But Chang Po-ling is unwilling to leave the cause of his life. To retain the position of the principal, In September 1948, Tianjin Mayor Du Jian will hired Chang Po-ling as a national Nankai University honorary principal, and Franklin Ho as the agent principal，and informed Chiang Kai-shek. On October 20, the executive officially released an order of Chang Po-ling resigned, and Franklin Ho was as New principal of Nankai, and did not transfer Chang Po-ling to his honorary principal. Franklin Ho wrote to the Ministry of Education (Taiwan), but not responded. At the end of the same year, Chang Po-ling left the Nanjing Examinations Institute on the pretext that she was weak and needed rest, and went back to live in Chongqing.
