One of the main goals of Micius will be to demonstrate quantum key distribution (QKD) between the satellite and stations on the ground. A quantum key is a string of ones and zeros, representing the quantum states of particles. These can be used to encode and decode hack-proof messages.
Another goal is to test some of the strange theories of quantum physics. For instance, Chinese physicists will attempt to quantum teleport a photon state from the Ali observatory on the Tibetan Plateau to the satellite, proving if successful that entanglement can exist between particles separated by orbital distances.