Academician Chen Chun, director of the Department of Information Science of Zhejiang University, said in an interview that in order to fight for China's initiative in the development of blockchain technology, it is necessary to vigorously develop domestically controlled blockchain technology platforms, including alliance chains and public chains. Research on core technologies and actively participate in international competition. Promote the deep integration of the blockchain with the real economy, so that "blockchain +" serves all walks of life. Chen Chun believes that the development of the alliance chain has strong practical significance. He believes that there are four core technologies that need to continue to break through in the current alliance chain, namely high-performance key technologies, security privacy key technologies, high-availability key technologies, and highly scalable key technologies.