Energy, transportation and information networks ETI networks are pivotal infrastructure for human society. ETI networks are characterized by wide coverage, huge scale of population served and of investment, high returns on investment, and provision of strong driving force to related industries, which ensures that ETI networks form a pillar of economic growth, a fundamental guarantee and engine of innovation for modern society. Seizing the opportunities presented by the new energy and information revolutions, the promotion of safe, reliable, cost-effective, green and low-carbon development of energy, transportation, and information networks has become a shared goal of countries worldwide. At present, despite rapid development in their respective fields, ETI networks face continuing difficulties including low resource efficiency and dwindling marginal benefit. In recent years, global economic growth has been caught in a downward spiral, which has been exacerbated by the recent onslaught of COVID-19. In order to foster a stronger recovery, and to revitalize the global economy, a new focal point must be found. ETIs fundamental, strategic and pioneering role in economic development makes the acceleration of the ETI networks coordinated development a matter of great urgency and significance. To comply with network infrastructures tendency towards wider coverage, digitalization, and increasing intelligence, efficiency and user-friendliness, and integrated functionality, ETI networks must better integrate resources, facilities, data, and services, permitting highly efficient resource use, highly integrated functionality, and extensive global interconnectivity. In this way, they can catalyze technological innovation and industrial upgrading, promoting and leading the high-quality development of the global economy. Drawing upon innovative ideas and experience from the transportation and information sectors, in combination with the latest Global Energy Interconnection GEI research and practice, this book sets forth a vision of Energy, Transportation and Information Network Integration ETI Integration which can be summarized by the slogan Watts, Bits and Metres. ETI Integration refers to a comprehensive system of next-generation infrastructure that is widely interconnected, highly intelligent, efficient, clean, low-carbon, open and shared. As a higher stage of global infrastructure development, ETI Integration will help resolve a raft of long-standing constraints on sustainable human development, paving the way for sustainable human development in future. Through holistic planning, coordinated development, and joint dispatching & scheduling, ETI networks leverage but only the digital and information-based advantage of Internet , but also the large-scale, intensive cross-network and cross-sector integration advantage of Internet. The synergies and overall value thus created will facilitate the innovative, green, efficient, and coordinated development of economic society. Innovative development refers to development which fosters new technologies, business models, industries, and paradigm such as clean energy, E-Mobility, Internet of Vehicles, and AI. Through thorough mobilization of_x005f_x005f_x005f_x005f_x005f_x005f_x005f_x005f_x005f_x005f_x005f_x005f_x005f_x000c_ various factors of production, the global economy will thereby be transitioned from its current industrial basis to a form defined by digital technology, platforms, and networks, injecting new impetus to economic growth. Green development refers to development which accelerates clean replacement in energy production and electricity replacement in energy consumption in the transportation and information technology sectors. Efforts will be made to expedite the transition of traditional industry to a low-carbon, green form, to promote the development of the recycling economy, to reduce global carbon emissions, and to improve the environment, in order to permit the harmonious coexistence of man and nature. Efficient development refers to development which improves the efficiency of resource usage and allocation, sparing labor, capital, land, resources and other factor inputs while encouraging cost reduction, efficiency enhancement and value improvement through ETI channel sharing, facility sharing, terminal co-construction and functional integration. Efforts to speed up the digital and intelligent transformation and upgrading of traditional industries, to foster an efficiency-driven intensive economic growth model, and to facilitate high-quality economic development, are also necessary. Coordinated development refers to promotion of the whole-cycle coordinated development of ETI networks across planning, construction, and operation, in order to achieve overall optimization of energy, personnelmaterial, information, and value flows, and to drive cross-border integration in various industries. This will also necessitate the elimination of internationalinterregional policy, financial and technological barriers, in order to promote economic and trade exchange, flows of funds, technology transfer and personnel exchange, thus promoting economic globalization and regional integration to build a community for the shared future of mankind. After reflecting on the respective development processes of ETI networks, and considering their future trends, this book proposes an innovative theoretical framework for ETI Integration, comprehensively expounds upon the inevitability, feasibility and driving forces of ETI Integration, and summarizes relevant innovative practices. On this basis, it examines and proposes development paths of ETI Integration, analyzes key areas and directions of development in technological and mechanism innovation, and anticipates the tremendous changes in economic and social development that ETI Integration will bring about. This book contains six chapters: The first chapter gives an overview of network infrastructure, explains its key role in economic and social development, and analyzes the main challenges facing ETI networks and likely trends in their future development. The second chapter reviews progress in the development of ETI networks, analyzes their current status, main challenges, and development trends, and looks forward their future functionality, format, and characteristics, and the great value they can deliver._x000c_ The third chapter analyzes the inevitability of ETI Integration, elaborating upon its 4-5- 5 theoretical framework, so named for four major driving forces reform, innovation, efficiency, policy, a five-layer integrated structure power, infrastructure, data, application, and paradigm, and five major models energy, infrastructure, data, operation, and industry, thus providing a theoretical basis for the guidance and promotion of the development of ETI Integration. The fourth chapter introduces the forms, typical scenarios and pathways of ETI Integration, analyses its 4 forms and 12 application scenarios, and proposes ETI Integration pathways and key areas from urban, domestic, transnational perspectives. The fifth chapter elaborates on the direction of ETI technology and innovation mechanisms, conducting an in-depth analysis of the latest progress and future prospects of ten key ETI technologies, and proposes ideas and measures for innovation mechanisms from six perspectives coordinated planning, construction and operation, financing and investment, standards, policies, and international cooperation. The sixth chapter examines the huge impact and driving effect that ETI Integration is set to have upon the world from five perspectives including industrial sector integration, economic development, environmental restoration, improvements in quality of life, and civilizational progress. ETI Integration will establish a new pattern of network infrastructure, bringing about extensive and profound change in economic and social development, and in human life and livelihoods. Ongoing progress in science and technology and growth in social needs will continually expand ETI Integrations range of application scenarios and innovative practices in areas including smart energy, smart transportation, and smart cities, thereby broadening its prospects for integrated development. This book is intended to provide a useful source of reference material and guidance for government departments, international organizations, businesses, financial institutions, and scientific research institutes, for purposes including policy formulation, strategic research, promotion of technological innovation and project development. We sincerely look forward to the concerted efforts of all parties concerned in promoting ETI Integration, and to pooling our knowledge, working together for a better future for humanity.