1982.02-2000.1/research intern, assistant researcher and associate researcher (during this period: 199 1 August to1July 1994, visiting microbiologist at the University of California, USA).
2000.12-2003.11Deputy Director of Animal Husbandry and Veterinary Bureau of Ministry of Agriculture.
2003.12-2006.09 deputy stationmaster, stationmaster and deputy secretary of the Party committee of the National Animal Husbandry and Veterinary Station; Director of National Animal Husbandry Station, Secretary General of China Feed Industry Association and Deputy Secretary of Party Committee.
2006.10-2008.09 Director of China Veterinary Drug Monitoring Institute, Director of Veterinary Drug Evaluation Center of Ministry of Agriculture and Deputy Secretary of Party Committee.
September 20, 20081March 7, 2008 (official).
20 13.07—— Member of the Party Group and Deputy Minister of the Ministry of Agriculture.