A China-made 3D printer is displayed at the Robotics Expo 2015 in Moscow, Russia, on Nov. 20, 2015.The 3rd International Robotics Expo kicked off here on Friday, in which emerging technologies such as 3D printing, virtual reality, drone, etc. were shown. (Xinhua/Dai Tianfang)

A human-like android is displayed at the Robotics Expo 2015 in Moscow, Russia, on Nov. 20, 2015.The 3rd International Robotics Expo kicked off here on Friday, in which emerging technologies such as 3D printing, virtual reality, drone, etc. were shown. (Xinhua/Dai Tianfang)

A visitor touches a China-made robot pet at the Robotics Expo 2015 in Moscow, Russia, on Nov. 20, 2015.The 3rd International Robotics Expo kicked off here on Friday, in which emerging technologies such as 3D printing, virtual reality, drone, etc. were shown. (Xinhua/Dai Tianfang)

A visitor tries a virtual reality device at the Robotics Expo 2015 in Moscow, Russia, on Nov. 20, 2015.The 3rd International Robotics Expo kicked off here on Friday, in which emerging technologies such as 3D printing, virtual reality, drone, etc. were shown. (Xinhua/Dai Tianfang)