Starting from the perspective of “time”, this book traces several historical periods of Dunhuang to offer readers a brief history of the region. From the perspective of “space”, it selects four classic caves of the Mogao Grottoes, showcasing Dunhuang’s culture and grotto art in a 360-degree, immersive, and close-up way. This book leads readers through time and across caves, driving the flow of the eyes with the physical movement to perceive the artistic beauty of every mural and sculpture, and to explore the historical mysteries on the Silk Road.