What if you hail a cab, open the door and find that there's no driver behind the wheel? Don't panic. You may have just stepped into a robotaxi. China already has more than 10 cities offering robotaxi services, while Tesla began offering a limited robotaxi service with its Cybercab in Austin, Texas, this September. But building a driverless car is one thing, making it work reliably in the real world is another. Join CGTN's Yang Zhao for a ride in a driverless car through Guangzhou during rush hour and explore how China and the US are bringing autonomous driving to city streets through different approaches.