Exhibitors from over 100 countries and regions to participate in 21st China Hi-Tech Fair in November

A visitor takes photos at the booth of Zhejiang Dahua Technology at the International Security Conference and Exposition (ISC West) in Las Vegas, the United States, April 10, 2019. Over 3,000 exhibitors from more than 100 countries and regions will participate in the 21st China Hi-Tech Fair (CHTF) in November, 2019. (Xinhua/Li Ying)