 From October 1989 to December 1991, Triết was appointed Deputy Secretary of Provincial Party Committee of, Bình dương and Bình Phước provinces.In the early years of economic renovation, Bình Dương and Ho Chi Minh City were fast growing places, attracting a lot of foreign investment capital.At the 7th National Congress of the Communist Party of Vietnam in June 1991, he was elected to the Central Committee of the Communist Party of Vietnam and served as a member of the Central Committee of the Communist Party.