Prof. YAN Jun is a scientist in astronomy and astrophysics, in particular, stellar molecular cloud and star formation such as Herbig-haro observation and theoretical research as well. He has taken charge a numerous of research projects supported by the Chinese Academy of Sciences and the National Natural Science Foundation of China, Submilimeter spectroscopic study on the formation and evolution of stars; Site survey and observation on the Antarctic Dome A, and Survey study and observation on Herbig-haro.