remote-controlled drone on display at the 16th China Hi-tech Fair, Shenzhen, Guangdong province. (Photo provided to China Daily)
Smart waitresses, developed by Shenzhen Okagv Company Limited, are seen at the China Hi-tech Fair, which opens in Shenzhen, Guangdong province, on November 16, 2015. (Photo by Qiu Quanlin/China Daily)
