Bridge body introduction: The bridge body is composed of 13 bowl-thick iron chains. There are 2 railings on each side of the bridge, and 9 wooden planks are laid side by side underneath to form the bridge deck. Each iron chain is interlocked by 862 to 997 iron rings handmade from wrought iron, with a total weight of 21 tons. Standing on the bridge, the sight of "cold iron cables crossing the Dadu Bridge" is self-evident.