Introduction to the Wind Tunnel: There is a strange cave on the mountainside of Mingyue Peak, which runs across the north and south. The middle is narrow and can only be accessed by one person. It forms two caves in the front and back, open in the north and south, in the shape of a gourd. The total length is 20 meters, the maximum width is 9.2 meters, and the maximum is 5 meters. The wind tunnel was originally an underground ancient river, with large ends at both ends and a small middle. It is located on high terrain, connected to the "Hunan-Guangxi Corridor" to the north, and the "gorge" between Jiaqiao Ridge and Haiyang Mountain to the south, forming convection, and the wind passes through it at both ends. The cross section is large and the middle is small, the wind speed increases, the pressure decreases, and the wind continues to replenish. As the seasons change, the winds vary from clear, gentle, warm, and cold.