Group 1 - The world's first humanoid robot half marathon took place in Beijing, featuring 20 robot teams competing on a course exceeding 21 kilometers [1] - The event included various awards, such as "Best Gait Award" and "Best Endurance Award," with a completion time limit of 4 hours and 10 minutes to earn a medal [1] - The race course started at Nanhai Park and ended at Tongming Lake Information City, featuring diverse terrain including flat and sloped areas, with a maximum slope of 9 degrees [4] Group 2 - Unique rules for the robot marathon included a "Z" formation start, with robots spaced 3 meters apart and a maximum of 2 minutes between each robot's start time [2] - Robots were required to maintain a distance of at least 1 meter from each other during the race, and teams could have up to 3 robots on the track simultaneously [2] - The course included 6 left turns and 8 right turns, with angles greater than or equal to 90 degrees, testing the robots' path planning and maneuverability [4] Group 3 - Sci-fi author Liu Cixin commented that the robot marathon serves as a demonstration of robots' balance and mobility capabilities, highlighting the potential market for caregiving and household robots [6] - The advancement of robots to a level capable of performing household tasks and caregiving could lead to significant changes in daily life and create a substantial market [6]