Professor Zhenya Liu, has been the senior engineer, President and Chairman of the State Grid Corporation of China since 2002 and has been engaged in electric power and energy work for many years. His published books include, Electric Power and Energy in China , Ultra-high Voltage AC/DC Grids, and Smart Grid Technology.The concept and development ideas concerning global energy interconnection in this book are based on the author’s many years of involvement in the strategic issues of China’s and the world’s energy and electricity development, especially combined this, with the successful practices of China’s UHV development.