Cinematic war disaster film feel, one-shot sequence. Under the gray-blue light of dawn, a young messenger rushes out of an underground bunker torn open by artillery fire. The camera closely follows him at high speed from behind, passing through muddy trenches, burning supply vehicles, shattered wooden bridges, and scattering crowds. Shells continuously fall in the distance, with dirt, wood chips, flames, and smoke columns exploding continuously on both sides of the lens, and soldiers and stretcher teams crossing the foreground, creating an extreme sense of presence. The protagonist climbs over a collapsed sandbag wall, slides down a waterlogged slope, and crosses an open area covered with barbed wire and shell craters, with the explosion shockwave kicking up huge dust clouds behind him. Finally, he rushes up the ruins of a half-destroyed bell tower, inserts a glowing signal flare into a high-altitude device, and the camera quickly pulls up, overlooking the entire burning battlefield and the advancing military formation in the distance, achieving a film-level realistic war scale, strong rhythm, and no cuts.