The He-Na Expressway from Jingxi to Napo is 124 kilometers long and is a typical karst mountain area. It is known as the most beautiful highway in China, a world-famous highway, and a must-visit route for self-driving tourists. The scenery along the way includes the Gulongshan Bridge Group, which crosses the Tongling Grand Canyon, the Gulongshan Grand Canyon, and the Sandieling Waterfall, three major scenic spots, where you can enjoy the canyons, caves, waterfalls, flowing water, and mountains; the frontier fairyland town - Jingxi, a livable city, and a paradise city for self-driving tourism; the 100 large bridges - crossing three mountains, the British "Mirror" called it "the most beautiful road in the world."