China's Ninebot unveils scooters that drive themselves to charging stations
The company also launched two self-driving delivery robots - one for outdoor delivery, the other for indoor services.
The company also launched two self-driving delivery robots - one for outdoor delivery, the other for indoor services.
An IPO of this size would make Uber one of the biggest technology IPOs of all time, and the largest since that of Chinese e-commerce giant Alibaba Group Holding Ltd in 2014.
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The Massachusetts attorney general's office has launched an examination into how Uber and Lyft cater to people with disabilities, potentially creating more regulatory problems for the ride-hailing companies.
Lyft has agreed to pay the state of New York $300,000 to settle claims that it is running a for-hire livery service in violation of state and municipal laws.