Zhang Wei, former chairman of the chemistry department at the University of Colorado Boulder, has returned to China to join Great Bay University (GBU) as a full-time faculty member.Zhang, who will be the deputy dean and chair professor of GBU’s physical sciences school, attended a hiring ceremony at the university’s Songshan Lake campus in Dongguan, in the southern Chinese province of Guangdong on July 2.He was presented with the appointment letter by GBU president Tian Gang, who is also a member of the Chinese Academy of Sciences. Why are more Chinese scientists leaving the US to return to China?“Professor Zhang…