Following the narrow passage between the escape exit of the tunnel and the rock wall, the temperature gradually cooled down. Venturing through a tunnel about forty meters long and slightly wider than shoulder-width, the underground cavern gradually opened up. Walking downhill along the slope, numerous stalactites stood tall, accompanied by the soothing sound of trickling water that echoed in the ears, indicating that the lifeblood river of Tunnel Village still flowed ceaselessly.