General engineer Zhu Zhencai (4th R), deputy chief engineer Zhou Yilin (4th L) and other staff members pose for a group photo with the quantum satellite at Shanghai Engineering Center for Microsatellites, under the Chinese Academy of Sciences, in Shanghai, east China, May 25, 2016.

Pan Jianwei, a Chinese quantum scientist and professor at the University of Science and Technology of China, demonstrates quantum communication, in Shanghai, east China, May 25, 2016.

Photo taken on May 25, 2016 shows the equipments on the quantum satellite at Shanghai Engineering Center for Microsatellites, under the Chinese Academy of Sciences, in Shanghai, east China.