Sheng Li / Reuters

Sheng Li / Reuters

A robot prepares 'jiaozi', or Chinese dumplings.

A robot that specializes in delivering food holds an empty tray after serving meals to customers at a Robot Restaurant in Harbin, China, Jan. 12. Opened in June 2012, the restaurant has gained fame for using a total of 20 robots, which range in height from 1.3 to 1.6 meters (4.2 feet to 5.2 feet), to cook meals and deliver dishes. The robots can work continuously for five hours after a two-hour charge, and are able to display more than 10 expressions on their faces and say basic welcoming sentences to customers.