Visitors to the 15th China Public Security Expo observe a drone produced by a Shenzhen company at the Shenzhen Convention and Exhibition Center in Futian District on Thursday. The four-day expo, which started Thursday, has nearly 1,100 exhibitors from 53 countries and regions. Nearly 80,000 kinds of security products are on display at the expo. Nearly 300,000 security professionals from more than 150 countries and regions are expected to visit the fair.

    China News Service