This volume presents the first definitive, full-length account of the construction of the Five-Hundred-Meter Aperture Spherical Telescope (FAST), currently the world’s largest single-aperture radio telescope. Based on over a year of on-site fieldwork and exclusive access to the project archives, the authors chronicle the complete lifecycle of this mega-science infrastructure-- from the complex site selection in Guizhou’s karst depressions to the engineering breakthroughs required to build the "Sky Eye." Beyond the technical engineering, the book offers a rare biographical record of Nan Rendong, the chief scientist and engineer, preserving the oral history of the scientific team. It serves as a primary source for scholars researching radio astronomy, infrastructure development, and the history of modern science in China.