I spent a day at a robot “carnival” in Shanghai. Here’s what I saw.

Humanoid robots are having a moment in China.

The popular machines are part of the country’s strategy to bring artificial intelligence into daily life.

Embedding the technology into physical systems—an idea called embodied AI—was a key facet of China’s latest five-year plan, and companies here are already world leaders in humanoids.

Nearly 90% of the…