Didi Chuxing Technology, China's dominant ride-hailing service, pledged this month to invest 140 million yuan ($20.39 million) to improve safety and customer service.
In May, Didi had also vowed to put through a range of safety enhancements. Those promises followed the rape and killing of a flight attendant in the central city of Zhengzhou, allegedly by the driver she had been matched with by Didi's Hitch carpooling service.
