B.S., animal science, Beijing Agricultural University(1987-1991) M.S., animal nutrition, China Agricultural University(1995-2000) Ph.D., animal nutrition, China Agricultural University (2004-2007) Visiting scholar at University of Arkansas (USA) (2009-2010) Beijing Agricultural University poultry breeding farm (1993-1998) College of Animal Science and Technology, China Agricultural University (1998-present)