Abstract:At 1:40 a.m. of August 16, 2016, quantum science experiments satellite "Micius" was launched from the Jiuquan Satellite Launch Center. This is the world's first satellite for quantum science experiments at space scale. After its launch, cooperated with five ground stations, the satellite would be used for scientific missions, including high-speed quantum key distribution between satellite and ground, quantum entanglement distribution and test of nonlocality at space scale, quantum teleportation between ground and satellite, and global scale quantum networks. "Micius" will further strengthen China's leading position in the field of quantum communication, establish the foundation for future global coverage quantum wide area communications network, and deepen people's understanding of the basic principles of quantum mechanics.