Four teams of humanoid robots faced off in fully autonomous 3-on-3 soccer matches powered entirely by artificial intelligence on Saturday night in China's capital.

China is stepping up efforts to develop AI-powered humanoid robots, using sports competitions like marathons, boxing, and football as a real-world proving ground.

China is stepping up efforts to develop AI-powered humanoid robots, using sports competitions like marathons, boxing, and football as a real-world proving ground.