Photo taken on May 25, 2016 shows the quantum simulation laboratory under the Chinese Academy of Sciences, in Shanghai, east China. China plans to launch the world's first quantum satellite that can achieve secure communication in July. The satellite is dedicated to quantum science experiments. (Xinhua/Cai Yang) 

Staff members work at the general control center for the quantum secure communication in Shanghai, east China, May 25, 2016. China plans to launch the world's first quantum satellite that can achieve secure communication in July. The satellite is dedicated to quantum science experiments. (Xinhua/Cai Yang) 

Photo taken on May 25, 2016 shows the quantum satellite assembly workshop at Shanghai Engineering Center for Microsatellites, under the Chinese Academy of Sciences, in Shanghai, east China. China plans to launch the world's first quantum satellite that can achieve secure communication in July. The satellite is dedicated to quantum science experiments. (Xinhua/Cai Yang) 

General engineer Zhu Zhencai introduces the "quantum entanglement source" on the quantum satellite at Shanghai Engineering Center for Microsatellites, under the Chinese Academy of Sciences, in Shanghai, east China, May 25, 2016. China plans to launch the world's first quantum satellite that can achieve secure communication in July. The satellite is dedicated to quantum science experiments. (Xinhua/Cai Yang) 

Deputy chief engineer Zhou Yilin (3rd L) discusses with other technicians beside the quantum satellite at Shanghai Engineering Center for Microsatellites, under the Chinese Academy of Sciences, in Shanghai, east China, May 25, 2016. China plans to launch the world's first quantum satellite that can achieve secure communication in July. The satellite is dedicated to quantum science experiments. (Xinhua/Cai Yang) 

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. China plans to launch the world's first quantum satellite that can achieve secure communication in July. The satellite is dedicated to quantum science experiments. (Xinhua/Cai Yang) 

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. China plans to launch the world's first quantum satellite that can achieve secure communication in July. The satellite is dedicated to quantum science experiments.(Xinhua/Cai Yang) 

Photo taken on May 25, 2016 shows the quantum simulation laboratory under the Chinese Academy of Sciences, in Shanghai, east China. China plans to launch the world's first quantum satellite that can achieve secure communication in July. The satellite is dedicated to quantum science experiments. (Xinhua/Cai Yang) 

General engineer Zhu Zhencai (L) and deputy chief engineer Zhou Yilin 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. China plans to launch the world's first quantum satellite that can achieve secure communication in July. The satellite is dedicated to quantum science experiments. (Xinhua/Cai Yang) 

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. China plans to launch the world's first quantum satellite that can achieve secure communication in July. The satellite is dedicated to quantum science experiments. (Xinhua/Cai Yang)