1985-87, scientist, Oregon National Primate Research Center and Smithsonian Institution, US. 1996-2005, Director, Kunming Institute of Zoology, Chinese Academy of Sciences. 1995-97, Visiting Professor, University of Wisconsin. 1996, named Director, China-US Joint Primate Biology Laboratory, which was co-established by Kunming Institute of Zoology and Wisconsin Primate Research Center. Currently, Professor and Director, Yunnan Key Laboratory of Primate Biomedical Research/Institute of Primate Translational Medicine, Kunming University of Science and Technology. Since the 1980s, engaged in primate reproductive biology research. His lab reported the first gene-modified rhesus and cynomolgus monkeys via Cas9/RNA-mediated gene targeting in 2014 and then first proved the feasibility of generating chimeric monkeys using ESCs in 2015. Research focuses on the generation of transgenic monkeys, stem cell self-renewal mechanisms and stem cell replacement therapy research. Author of numerous publications and high-level magazines, such as "Cell", "Cell Stem Cells", "PNAS", "Biology of Reproduction" and "Human Reproduction".