This book states that the seventh information revolution is the intelligent Internet, and 5G is the foundation of the seventh information revolution. This book gives a clear introduction to the three major scenarios, six characteristics, core technologies, and global landscape of 5G, and answers "What is true 5G?" This book also gives an in-depth explanation of 5G-enabled traditional industries, and outlines the profound changes that 5G will bring to transportation, medical, industry, and agriculture. Finally, the author made bold assumptions about the opportunities and challenges that human society faces in the post-5G era. For readers who want to fully understand 5G, this book provides an important reference and is a must-have book.