Richard Liu runs his business big. His e-commerce giant (and Alibaba rival) JD.com has a delivery team of more than 20,000 people so as to guarantee same-day service in 130 districts and counties in China. But Liu, who may well be a billionaire after the company’s IPO last year, leads with a mighty small ego. He has few of the trappings of a celebrity CEO and still spends a day every year as a JD.com deliveryman. Yeah, that’s him—on the tricycle scooter.