Video PlayerClose
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)
20th China Hi-Tech Fair held in Shenzhen, S China's Guangdong
Source: Xinhua| 2018-11-17 17:13:15|Editor: Li Xia
