In recent months, Kalanick has seen an exodus of top executives as the company investigates claims of sexual harassment, is facing a lawsuit over self-driving car technology from Alphabet's Waymo and was videotaped arguing with a driver over fee structure. Didi Chuxing is a four-and-half-year-old app, which is used to hail more than 20 million rides daily in Chinese cities. Its home is a country where car ownership has only recently started to surge – with roughly 800 million urban residents, but only 200 million personal vehicles – and many fast-growing cities still lack efficient subway or bus systems. The pent-up demand for periodic chauffeur-service ensured rapid early growth.