Introduction to Zhuolong Bridge: Duilong Bridge was built in the 24th year of Daoguang reign of the Qing Dynasty. The bridge body is made of strips of stone and square stones in a folk arch shape. It is named because the entire bridge body looks like an upside-down dragon. . After hundreds of years of wind and rain erosion, this bridge is still as strong as ever. In 1990, it was listed as a key cultural relic protection unit in Dinghai District. There is a sister bridge built behind the bridge side, reaching the artistic realm of "two dragons reflecting each other".