One of Tesla CEO Elon Musk’s worries was on full display at technology show CES in Las Vegas this week. Chinese-made human-like robots were everywhere across the exhibition floor, playing table tennis, sweeping floors and practicing kung fu.

China’s latest robotics innovations were delivered to the heart of America’s technology showcase, serving a constant reminder of the technological race between the world’s two biggest economies. While Santa Clara, California-based Nvidia and Advanced Micro Devices hosted keynotes touting ever faster artificial intelligence chips, a legion of budding Chinese robot creators occupied much humbler booths with machines giving life to the notion of physical AI.

Fourier Intelligence unveiled its latest GR-3 humanoid; Booster Robotics deployed over 30 robots in synchronized choreography; X-Humanoid demonstrated the sprinting speed of its Tiangong Ultra, winner of last year’s Beijing humanoid half-marathon; and Unitree showcased acrobatic routines performed by a dozen machines. Booths operated by Galbot, AgiBot and EngineAI showed off multitasking capabilities and industry-ready systems to prospective buyers, signaling ambitions to expand overseas and translate technical prowess into global sales.