For Xingzhe No.1, the path ahead was smooth. It was also repetitive and unchanging, a flat course in an indoor gymnasium. For 54 hours the robot, whose name translates to "walker," patrolled the same set path. That's long enough to watch Waiting for Godot 21 times. Eventually, the robot ran out of power, and stopped. By the time its battery died, it had taken 360,000 steps, covering 83 miles in total. Unconscious and immobile, Xingzhe earned a Guinness World Record for farthest distance walked by a quadruped robot.