Fall in new cases raises hope in virus outbreak in China

In this Tuesday, Feb. 11, 2020, photo released by China's Xinhua News Agency, a drone carries a QR code placard near an expressway toll station in Shenzhen in southern China's Guangdong Province. As a measure to help prevent and control novel coronavirus, an online register system for vehicles coming back to Shenzhen has been put into use since Feb. 8. To increase the efficiency, local police officers used drones to carry a QR code at the expressway exits for drivers to get registered with less contact with other people.