David Farber, a distinguished professor at Japan's Keio University, speaks at a sub-forum during the sixth World Internet Conference in Wuzhen, east China's Zhejiang Province, Oct. 20, 2019. The sixth World Internet Conference opened Sunday in Wuzhen. With the theme of "Smart, connectivity, openness and cooperation: jointly build a community of shared future in cyberspace," the three-day conference will bring together more than 1,500 participants from over 70 countries and regions, including members of the Internet Hall of Fame, Nobel Prize winners and Turing Award winners. (Xinhua/Yin Dongxun)