, Sept. 29 -- In China, graduation ceremonies are no longer limited to human students. Robots are also completing training and moving into jobs.

Thirty robots formed the first class at a robot school in Hangzhou, east China's Zhejiang Province. After more than two months of training, four have graduated and taken up formal jobs.

One now works as a museum guide in Hangzhou, another leads visitors around the robot school, while a third inspects equipment at a Nestle production workshop in Tianjin. The fourth has traveled to the Republic of Korea to perform on the piano.

Their progress shows one of the major challenges facing embodied artificial intelligence, or AI designed to interact with the physical world. Training robots for real-wor...