A man checks on a robot at a restaurant in Hefei, Anhui province, December 26, 2014. The restaurant, with a space of 1300 square metres and a total of 30 robots to cook meals, deliver dishes and welcome costumers, was reported to be the biggest robot restaurant in China. (Photo by Reuters/Stringer)

A cook works in front of robots at the kitchen of a restaurant in Hefei, Anhui province, December 26, 2014. (Photo by Reuters/Stringer)

A cook stands behind a robot as it process food at the kitchen of a restaurant in Hefei, Anhui province, December 26, 2014. (Photo by Reuters/Stringer)

A robot delivers dishes at a restaurant in Hefei, Anhui province, December 26, 2014. (Photo by Reuters/Stringer)

A man puts dishes on robots for delivery at a restaurant in Hefei, Anhui province, December 26, 2014. (Photo by Reuters/Stringer)

A man gestures to a robot at a restaurant in Hefei, Anhui province, December 26, 2014. (Photo by Reuters/Stringer)