The professor of School of Earth and Space Sciences, the technical director of PKUGAC, the deputy director of art works evaluation committee of Culture Market Development Center, the standing director of Gems & Jewelry Trade Association of China, the deputy director of identification and evaluation committee, the deputy director of jades committee,

the scientific consultant of China Ornamental Stones Association., the identification expert of CCTV 2; ever served as the director of  staff room of rock and mineral, deposit and gems, and part-time member of regional geology and mineralogy specialty committee and Precambrian geology specialty committee; cultivated 15 graduate students; engaging in teaching the course of gemology, ways of gems identification, gems deposit, systematic identification of gems and so on; done many research on gems field and published about 20 papers.