Chongqing Black Valley Scenic Area (Black valley) is a national AAAAA tourist attraction, national forest park, and national geological park. The area of the scenic spot is 100 square kilometers, the maximum difference between the top of the mountain and the bottom of the valley is 1200 meters, the length of the canyon is 13 kilometers, and the slope of the two sides of the river valley is 70 to 80 degrees. It is an excellent place to go through the canyon. The Heigu Valley Scenic Area in Chongqing is composed of two core scenic spots, Heigu Valley and Wansheng Stone Forest. It is hailed by experts as the "Yuqian Biological Gene Bank", Chongqing's unique "biological gene bank", and "Southwest Shennongjia."