Group 1 - The core achievement of the humanoid robot "Walker No. 2" is its performance in the 1500-meter event at the 2025 World Humanoid Robot Games, where it secured first place with a time of 11 minutes and 45.90 seconds [1] - "Walker No. 2" has demonstrated significant advancements in its tendon bionic (rope) drive technology, which has resulted in a 40% reduction in weight compared to traditional drive methods, enhancing speed and agility [1] - The robot's design features full-sized legs that contribute to its impressive stride and explosive power, allowing it to perform exceptionally well in competitive settings [1] Group 2 - The 2025 World Humanoid Robot Games is the first comprehensive event focused on humanoid robots, featuring 280 teams from 16 countries and regions competing in 26 events over three days [2] - "Walker No. 2" participated in multiple events, including the 100m, 400m, and 1500m races, showcasing its advantages in speed, explosiveness, and stability [2] - The development team emphasizes the importance of software and hardware collaboration, which has led to hundreds of iterations optimizing the robot's movement, balance, and energy efficiency [1][2]