An exhibitor shows f 4D printing works of ceramic samples at the 20th China Hi-Tech Fair (CHTF) in Shenzhen, south China's Guangdong Province, Nov. 16, 2018. (Xinhua/Mao Siqian)
An exhibitor shows an underwater drone at the 20th China Hi-Tech Fair (CHTF) in Shenzhen, south China's Guangdong Province, Nov. 16, 2018. (Xinhua/Mao Siqian)
An exhibitor shows a device to assist knee joint at the 20th China Hi-Tech Fair (CHTF) in Shenzhen, south China's Guangdong Province, Nov. 16, 2018. (Xinhua/Mao Siqian)
An exhibitor shows a robot at the 20th China Hi-Tech Fair (CHTF) in Shenzhen, south China's Guangdong Province, Nov. 16, 2018. (Xinhua/Mao Siqian)
People experience headset to translate speech in real time at the 20th China Hi-Tech Fair (CHTF) in Shenzhen, south China's Guangdong Province, Nov. 16, 2018. (Xinhua/Mao Siqian)
