The emergence of Internet technology brings great convenience to the society but causes great risks. We need to seek a unconditional security communication method in the theory to effectively cope with organized cyber attacks and avoid great losses and harms to national security caused by data leakage.

Quantum, as the basic unit of matter and the basic carrier of energy, shows the inseparatable and reproduced physical properties. According to quantum mechanical theory, it is impossible to replicate exactly any unknown quantum state. That is, once the quantum signal is tapped, the quantum superposition state will be disturbed and collapsed into another quantum state, and the two parties can detect it immediately.

Quantum secure communication is a new communication method for secure transmission through that single photon quantum states are indivisible and non replicating and by combining with a one-time-pad secret encryption method, showing unconditional security features that cannot be tapped or deciphered.

As a strategic and sophisticated technology, quantum communication has important application value and prospects in the fields of national security, military, finance, energy and scientific research, and it attracts attentions of the leaders in China.

As China's first global quantum science experimental satellite launch and optical fiber quantum communication Beijing Shanghai route network in a total length of 2000 km is put into operation, it indicates that China's "quantum communication" technology has gone out of the laboratory and fully entered the practical stage.

In 2015, CEICloud and QuantumCTek founded the cei-quantum communication, a joint venture company. The application of quantum communication technology in the field of data centers is promoted by using market forces to gradually build a wide area of quantum communications network covering important cities nationwide.

At present, Beijing has completed the construction of quantum communication network of "Yizhuang Data Center of CEICloud - QuantumCTek" and interacts with Beijing Yizhuang data center of CEICloud.In the future, a new generation of big data infrastructure is formed by clustering with Green IDC & cloud services of CEICloud and wide area quantum communication network, which provides green and reliable infrastructure services for China's big data and "Internet +" strategy.