He was the Chief Engineer of the Science & Technology Bureau of the Ministry of Chemical Industry (China) in 1973–1981.
In 1981 he attended the University of California, Los Angeles, and graduated in 1984 with a Master of Business Administration (MBA).
He then returned to his former position as Chief Engineer of the Science & Technology Bureau of the Ministry of Chemical Industry until 1988, when he was promoted to the Vice-President and Chief Engineer of the Scientific and Technical Research Institute of the Ministry of Chemical Industry.
He became the Deputy Chief Engineer of the Ministry of Chemical Industry in 1993 and Vice-Minister of Chemical Industry in 1994–1997.
During the same period, he held the position of the Chairman of the China Democratic National Construction Association (CDNCA) Central Committee, from 1996-1997.
He continued to hold dual positions for nearly ten years, as the Chairman of the 7th and 8th Central Committees of the Chairman of the China Democratic National Construction Association (CDNCA) from 1997–2007, and as the Vice-Chairman of the Standing Committee of the Ninth and Tenth National People’s Congresses  in 1998–2008.
During this time, he was also awarded an Honorary Doctor of Business Administration from Hong Kong Polytechnic University.
He was the Chief Engineer of the Science & Technology Bureau of the Ministry of Chemical Industry (China) in 1973–1981. In 1981 he attended the University of California, Los Angeles, and graduated in 1984 with a Master of Business Administration (MBA). He then returned to his former position as Chief Engineer of the Science & Technology Bureau of the Ministry of Chemical Industry until 1988, when he was promoted to the Vice-President and Chief Engineer of the Scientific and Technical Research Institute of the Ministry of Chemical Industry. He became the Deputy Chief Engineer of the Ministry of Chemical Industry in 1993 and Vice-Minister of Chemical Industry in 1994–1997. During the same period, he held the position of the Chairman of the China Democratic National Construction Association (CDNCA) Central Committee, from 1996-1997. He continued to hold dual positions for nearly ten years, as the Chairman of the 7th and 8th Central Committees of the Chairman of the China Democratic National Construction Association (CDNCA) from 1997–2007, and as the Vice-Chairman of the Standing Committee of the Ninth and Tenth National People’s Congresses  in 1998–2008. During this time, he was also awarded an Honorary Doctor of Business Administration from Hong Kong Polytechnic University.
Cheng Siwei