Elon Musk thinks robots are a $10 trillion business. He’s got some competition from China

Spinning bright red handkerchiefs and dancing in step to folk music, more than a dozen human-like robots took to China’s biggest stage in January, making a splashy debut at the annual Lunar New Year gala.The remarkable performance, watched by more than a billion people, is a high-profile reminder of how far Chinese humanoid robots have come. Over the past two months, videos of the country’s