200 1 May, visiting scholar at Durham University, UK; Visiting Scholar, Simon Fraser University, Canada, 2002-2003; In August, 2005, he was a visiting researcher at the Media Management and Transformation Research Center of the International Business School of Yenxueping University, Sweden. From September 2005 to June 2006, he was a visiting researcher at the Kennedy School of Government of Harvard University. February to August, 2006, Leverhorn Visiting Professor, university of westminster, UK. He has visited, lectured and had academic exchanges in German, French, Swedish, Belgian, Irish, Korean, Japanese, Puerto Rican, Vietnamese, Hongkong and Taiwan Province provinces.