Book introduction Richard Hong, a resident of Yangsan, is a seasoned professional in the field of communications construction. With a remarkable career spanning 30 years, Richard has served as a communication technology engineer and site manager in Korea. Throughout his tenure, he has actively participated in diverse communications projects, specializing in both wired and wireless optical communication. From earlier pager systems to the latest advancements in 5G networks, Richard possesses comprehensive knowledge and experience in various technologies. Motivated by his dedication to the field and a desire to share his insights with others, Richard has authored a book focused on communications construction. This book is intended for those who are unfamiliar with the field, including teenagers, as well as individuals in entirely different professions who seek to broaden their understanding of communications. Drawing upon his three decades of experience, Richard has meticulously compiled and organized photographs and documents from communications construction sites where he has worked. With detailed explanations and accompanying visuals, readers can gain a unique perspective on the field. Given the sensitive nature of public office construction, Richard has taken great care to ensure security and confidentiality. Certain photographs and security documents containing important information have intentionally been blurred or obscured. It is important to note that this book does not delve into indepth technical knowledge. Instead, it presents episodes and anecdotes from the communications construction site, offering a light and engaging read akin to a collection of essays. Richard Hong dedicates this book to the communications engineers who tirelessly contribute to the establishment of technological infrastructure in Korea. He extends his heartfelt consolation and respect to those individuals who dedicate their efforts and energy to the communications construction sites, shaping the future of the field. Richard Hong, Yangsan, June 2023.