1949- 1952 graduated from northern jiaotong university (now Beijing jiaotong university), majoring in railway signal from Beijing railway institute and Harbin railway institute.
1953- 1957 interns, technicians and engineers in the electrical design room of the general design bureau of the Ministry of Railways.
1958- 1959, Moscow Railway Research Institute of the former Soviet Union for further study.
1960- 198 1 year Engineer, Research and Design Institute, Communication and Signal Company, Ministry of Railways.
1982- 1988 Senior Engineer, Research and Design Institute, Communication Signal Company, Ministry of Railways.
1989- 1995 professor-level senior engineer of research and design institute of communication and signal company of Ministry of Railways.
1retired and re-employed in June 1995.