HONG KONG -- Shares of Alibaba-backed RoboSense got off to a weak start in their first day of trading in Hong Kong, amid questions over whether costly lidar sensor technology will find favor with makers of self-driving cars.
Questions grow over how many self-driving cars will use costly sensors over cameras

Alibaba-backed RoboSense, which makes lidar sensors for cars with self-driving functions, made its debut on the Hong Kong stock market on Jan. 5. (Photo by Cissy Zhou)
HONG KONG -- Shares of Alibaba-backed RoboSense got off to a weak start in their first day of trading in Hong Kong, amid questions over whether costly lidar sensor technology will find favor with makers of self-driving cars.