This book is a part of the Blue Book series “Research on the Development of Electronic Information Engineering Technology in China�, which explores the cutting edge of blockchain technology studies. The research objects of blockchain are the concept, development process, core value of blockchain, and focuses on the core technology and classification of blockchain technology. And summarizes the development situation of the global and Chinese blockchain industry, including the status quo of policy measures, standard construction, and application development. Finally, summarize the main innovation points of blockchain technology, including its development in China, and prospects the future development of blockchain technology. This book is intended for researchers and industrial staffs who have been following the current situation and future trends of the blockchain. Meanwhile, it also bears high value of reference for experts, scholars, and technical and engineering managers ofdifferent levels and different fields.