198901-199310 Deputy Chief of Mud Logging Brigade of Geological Logging Company (deputy division level)
199311kloc-0/99502 captain of comprehensive logging team of geological logging company (Zheng Ke)
199502-200009 Vice-captain of No.2 Mud Logging Company (Zheng Ke).
200009-2003 1 1 Deputy Director of Research Institute of Geological Logging Company (Zheng Ke)
200311-200511Deputy Chief Geologist of Geological Logging Company and Director of Research Institute.
2005 1 1- now chief geologist (deputy division level) of geological logging company.