BEIJING — Chinese robotaxi companies are expanding abroad at a faster clip than U.S. rivals Waymo and Tesla — at a time when industry leaders say autonomous driving is finally near an inflection point. "I think robotaxi has reached a tipping point, both here in China and in the U.S.," Baidu CEO Robin Li said Tuesday on an earnings call, according to a FactSet transcript. "There are enough people who have [had the] chance to experience driverless rides, and the word of mouth has created positive