China News Service, December 29. According to Didi Chuxing’s official Weibo news, Didi Chuxing announced on the 28th that it will upgrade its epidemic prevention and control measures in Beijing and will continue to provide free nucleic acid tests for Didi and Huaxiaozhu ride-hailing drivers. The online review technology will be upgraded, the driver's health treasure will be verified before leaving the car every day, and the driver will be subjected to a smart random inspection of wearing a mask during the trip.