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Photo taken on Aug. 15, 2016 shows Pan Jianwei, chief scientist of the Quantum Experiments at Space Scale (QUESS) project with the Chinese Academy of Sciences (CAS). China successfully launched the world's first quantum satellite from the Jiuquan Satellite Launch Center in northwestern Gobi Desert at 1:40 a.m. on Tuesday. After three months of in-orbit testing, the satellite is designed to start "hack-proof" quantum communications by transmitting uncrackable keys from space to the ground. (Xinhua/Jin Liwang)
