A girl takes dishes delivered by the robot waiter in Haikou, capital of south China's Hainan Province, Aug. 3, 2015. A robot waiter was introduced to a restaurant in Haikou. (Xinhua/Guo Cheng)

Customers look at the robot waiter in Haikou, capital of south China's Hainan Province, Aug. 3, 2015. A robot waiter was introduced to a restaurant in Haikou. (Xinhua/Guo Cheng)

A curious boy reaches for the robot waiter in Haikou, capital of south China's Hainan Province, Aug. 3, 2015. A robot waiter was introduced to a restaurant in Haikou. (Xinhua/Guo Cheng)

The robot waiter delivers dishes in Haikou, capital of south China's Hainan Province, Aug. 3, 2015. A robot waiter was introduced to a restaurant in Haikou. (Xinhua/Guo Cheng)