On October 31, Xinhua News Agency published the article "The blockchain royal" wind, how is the safety net densely woven? 》. The article points out that to promote the development of blockchain technology and industrial innovation, and to promote the development of blockchain and economic and social integration, we must first build a security fence for blockchains, and explore the establishment of a security system that adapts to the technical mechanism of blockchain. At present, China is accelerating the development of blockchain technology innovation and application. There are many security risks in the core technology, mechanism and application deployment of blockchain. If criminals use relevant vulnerabilities to carry out attacks, it may cause serious security risks.