This essay is a summary an article was written by Jacob Aron, and posted in newscientist.com. The original titles of summary is "China launches world's first quantum communications satellite", the satellite name is Quantum Science Satellite (QUESS). QUESS has been the first quantum communications satellite in the world that was sending up by China. It is sophisticated technology by using uncollapsable communications network.
University of Science and Technology of China was experimenting this satellite to try quantum entanglement by using photons. The test used quantum pellets that connected separately at 1200 kilometres. On the other hand, they apply quantum lock channelization to test security from eavesdroppers.
However, QUESS is best satellite technology, but it must be test by advanced experiment to unsure all device that ready to use and the end of validation has been done in the orbit. Many scientists hope, it can help all people in the world to work on the free-space quantum communication.