The US is still experimenting with drone delivery, but Chinese companies have been doing it successfully for years.

A hungry teen opens his phone. A few taps later, he places an order. Within just a few moments, a meal arrives at his doorstep.  In the past decade, food delivery services such as DoorDash, Grubhub, ...

DoorDash, Inc. (DASH) has partnered with Coco Robotics to deliver food orders in parts of Los Angeles and Chicago. This makes ...