In the field of quantum communication, China's research team has been at the forefront of the world. In the field of quantum computing, China is very close to the world leader, if not the world leader. According to public information, at present, quantum communication in China has been industrialized. Guo Dun Quantum was listed on the Growth Enterprise Market on 20 19, and many QDK (Quantum Key Distribution) devices have been put on the market. Quantum computing started late in China, and there are not many commercial companies. At present, domestic commercial start-ups engaged in quantum computing research and development have launched the first integrated quantum measurement and control system in China, which has rich products in the field of low temperature measurement and control. Taking superconducting and semiconductor quantum computers as the research and development direction, 6-bit superconducting quantum chips and 2-bit semiconductor quantum chips have been released, among which the level of semiconductor quantum chips is in the international advanced ranks. In terms of quantum precision measurement, there is still an order of magnitude technical gap between China and foreign advanced countries. But the achievements in quantum radar are more advanced.

Judging from the development of China in the field of quantum information, we are in a leading position in the field of quantum communication, and started late in the field of quantum computing. Although we are catching up quickly, we are still slightly behind the United States. With the increase of quantum bits, the development of quantum technology can be divided into three stages. In the first stage, there are 1- 10 qubits, which can realize quantum communication. In the second stage, quantum sensing can be realized when the qubit reaches 10- 100. In the third stage, more than 100 qubits enter the quantum computing stage. However, the current research has entered the stage of quantum perception, and quantum communication has already had some practical applications, while quantum computing is still in the demonstration stage, and no quantum computer with practical value has been created. Among several applications of quantum information, quantum secure communication is the only one that has entered the practical stage at present.

As a national strategic industry, the development of quantum communication industry has been supported by national strategies, technical guidance, industrial promotion, engineering construction and other policies, which have appeared in the Thirteenth Five-Year Plan for National Economic and Social Development and? Thirteenth Five-Year Plan? National Strategic Emerging Industry Development Plan and other important national plans. At the same time, the National Development and Reform Commission also included the first phase of the national wide-area quantum secure communication backbone network construction project in the list of support projects for the new generation information infrastructure construction project in 20 18. 20 19 The latest development plan of regional integration in the Yangtze River Delta, quantum information has also become the focus of the future planning and layout of industries in the Yangtze River Delta.

In commercial applications, quantum secure communication has been applied to government, finance, electric power, national defense, Internet and other industries. As far as the banking industry is concerned, many banks have realized quantum security communication products and applications such as RMB cross-border payment management system, encrypted transmission of data backup in the same city, and threat information sharing platform in the banking industry. According to the development trend of quantum communication application described in the research report of the British Government Science Office, the application of quantum communication is still in the early stage. In the future, with the maturity of networking technology and the miniaturization and mobility of terminal equipment, the application of quantum communication will be extended to telecom networks, enterprise networks, individuals and families, cloud storage and other fields, and it is expected to produce a series of new applications such as quantum cloud computing and quantum sensor networks for a long time, and truly enter the quantum Internet era.