PR2: A Physics‐ and Photo‐Realistic Humanoid Testbed With Pilot Study in Competition. - Liu, Hangxin; Xie, Qi; Zhang, Zeyu; Yuan, Tao; Wang, Song; Wang, Zaijin; Leng, Xiaokun; Sun, Lining; Zhang, Jingwen; He, Zhicheng; Su, Yao (Journal of Field Robotics, 2025)