The Sino-Vietnam Railway Bridge is located on the south side of Hekou County, crossing the Nanxi River. To be able to construct a hundred-kilometer railway over the red clay plateau, while utilizing the technology and industrial capabilities of a century ago, is undoubtedly one of the most magnificent projects in the history of railway construction. At the midpoint of the bridge is the Sino-Vietnamese border. The northern section of the bridge is under the jurisdiction of China, while the southern section is under the jurisdiction of Vietnam. In the middle of the bridge is a narrow-gauge railway track, and on the sides of the track bed are paths for cars. After the opening of the Houhekou Zhongyue Highway Bridge, vehicle traffic no longer passes across this bridge. The railroad surface that the vehicles repeatedly crushed down shines brightly in the sun, telling the story of the “South Gate” of China, opening up the road to Southeast Asia.