Humanoid robots pose for photo at the Humanoids Summit 2026 in Tokyo, Thursday, May 28, 2026. (AP Photo/Ayaka McGill) TOKYO — Mechanical hands dexterous enough to thread a needle, childlike dancing robots and adult-sized ones to help with deliveries were on display Thursday as the Humanoids Summit Tokyo opened.Among the dozens of companies taking part, including well-known players like Boston Dynamics and Toyota Motor Corp., the big stars now were clearly the Chinese.Chinese newcomers, like Booster Robotics and LimX Dynamics, took the technology initially developed in Japan and the U.S. and fine-tuned it, often for cheaper mass production. It’s a…