The action came after a 21-year-old woman who booked a ride through Didi was killed in the central Chinese city of Zhengzhou on May 6, according to police.
"Didi is now seeking the public's help for any clues relevant to the driver identified as Liu Zhenhua", the company said in a social media post Thursday night.
Didi itself today announced (in Chinese) a reward of up to 1 million yuan ($157,500) for important tips about the case.
Soon after the ride started, she said she was a little anxious about the driver in a WeChat conversation with a friend obtained by The Paper (screenshot from link above): "He's a bit lecherous, he said I'm really attractive and he wants to kiss me".
According to the South China Morning Post, after getting into the vehicle with Zhenua, Li texted a colleague that she had "bumped into a pervert".
Zhengzhou, capital of China's Henan province.
This exchange was the last the colleague heard from Li.
The next day, May 7, after failing to get in touch with Li, her family reported her disappearance to Didi Chuxing and the local police.
In an interview with Li's father, he said that his daughter had been stabbed 20 times and was found naked.
Didi's Hitch enables private drivers to pick up passengers who are headed to similar destinations.
The case has Chinese netizens anxious and questioning whether the company can indeed protect passenger's safety. "In this matter, we have an unshakable responsibility", the ride hailing company Didi said in a statement that was issued at noon yesterday. The case comes as another blow to the company; since the beginning of the year, Didi has been fighting out a turf war with competitor Meituan that began in Nanjing.