A Didi Chuxing passenger allegedly killed his driver in Changde, Hunan province, according to local police.
Police said that the suspect, a 19-year-old man surnamed Yang, hailed a Didi late Saturday night, and then stabbed the driver, surnamed Chen, several times with a knife, as he was about to alight near a bus station around midnight.
Yang later surrendered to police and confessed to long harbouring thoughts of suicide that led to a breakdown on the Saturday night and then the killing.
Didi said in a statement Sunday: "We have set up an emergency response team to fully co-operate with the police for investigations. And we have sent staff to visit and comfort the driver's family to help with the follow-up matters and provide humanitarian assistance."
China's biggest ride-hailing provider, Didi, was at the centre of public outcry after two female passengers were killed last year by two of the company's drivers in separate cases in May and August.