This work is installed inside the Coastal Defense Exhibition Hall on the Yellow Sea frontline in Dalian. As visitors follow the exhibition route through the venue, they encounter three core display sites and embark on an immersive journey through the grand chronicle of coastal defence. At the exhibition hall entrance, rolling waves rendered in light art surge forward, with vast Yellow Sea billows and roaring tides opening the historical prologue of this maritime frontier. Further along the route lies the site of the Tang Protectorate General`s Office. In light art, city walls gradually take shape, and fortified protectorate offices stand guard over the remote borderlands. Wars rise and fall; soldiers fight bravely to secure the frontier and safeguard trade and cultural exchanges along the Silk Road. At the final stop of the visiting route stands a sculpture of border guards. Light art transforms the four seasons: towering spring surf, violent summer thunderstorms, swirling autumn sandstorms and bitter winter snow. Generations of border defenders endure the harsh island environment and hold fast to their posts. From the shoreline and ancient protectorates to modernday garrison troops, a single visiting thread connects past and present, allowing viewers to understand the enduring devotion to safeguarding our maritime homeland across the ages.