Yang Gao is a teacher in the Computer Science Department at the Nanjing University. He won the IBM China Visitorship Program in 2003 and visited the ETI in HKU from June to September 2003. He visited the University of Western Sydney in Dec, 2004, the Hong Kong Baptist University from Jan., 2005 to Feb., 2005 and Massey University, New Zealand in Dec, 2006.