Composite photo taken on Nov. 9, 2016 shows a satellite-to-earth link established between quantum satellite "Micius" and the quantum communication ground station in Xinglong, north China's Hebei Province. Chinese scientists on Thursday reported a major breakthrough in quantum communication: A pair of entangled photons over a distance of 1,200 km have been successfully transmitted from space to Earth. The previous record was about 100 km. (Xinhua/Jin Liwang)
