UPS launched its self-driving service in May, with a driver and engineer monitoring behind the wheel.
Auto tech companies are stepping up efforts to roll out commercial self-driving taxi service to help recoup costs.
TuSimple has been running daily routes for customers in Arizona and was last year given permission to test its trucks on selected roads in Shanghai.
AutoX and Pony.ai had also granted first batch of licenses to conduct road testing in the southern Chinese city of Guangzhou.
It is the latest in a series of prominent startups listing abroad, unimpressed by the new STAR market.