Hong Kong CNN — 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 humanoid robots pulling off moves such as bike rides, roundhouse kicks and side flips have blown up the internet, often amplified by state media as a key potential driver of...