People look at the robot with heavy load during the world intelligent manufacturing summit in Nanjing, capital of east China's Jiangsu Province, Dec. 6, 2017. The 3-day summit which kicked off on Wednesday attracted more than 300 enterprises. (Xinhua/Li Bo)

People visit the world intelligent manufacturing summit in Nanjing, capital of east China's Jiangsu Province, Dec. 6, 2017. The 3-day summit which kicked off on Wednesday attracted more than 300 enterprises. (Xinhua/Li Bo)

Bullet train models are seen during the world intelligent manufacturing summit in Nanjing, capital of east China's Jiangsu Province, Dec. 6, 2017. The 3-day summit which kicked off on Wednesday attracted more than 300 enterprises. (Xinhua/Li Bo)

A man experiences VR with the help of a staff member during the world intelligent manufacturing summit in Nanjing, capital of east China's Jiangsu Province, Dec. 6, 2017. The 3-day summit which kicked off on Wednesday attracted more than 300 enterprises. (Xinhua/Li Bo)