China urges caution -- and speed -- on assisted-driving technology

China's automakers are outpacing foreign rivals in their push for assisted-driving technology, eager to woo motorists hungry for rapid innovation. Yet, Beijing has a nuanced message for its rising stars: move fast -- but be careful. Regulators this week have been finalizing new safety rules for driver-assistance systems as Beijing sharpens scrutiny of the technology following an accident involving a Xiaomi SU7 sedan in March. That incident killed three occupants when their car crashed seconds after the driver took control from the assisted-driving system.