Beam bridges existed during the Eastern Han Dynasty. During the Sui, Tang, and Song Dynasties, bridge construction technology reached its peak. Famous bridges in ancient times include: Marco Polo Bridge, Guangji Bridge, Luoyang Bridge, Wuting Bridge, Anping Bridge, Zhaozhou Bridge, Cross Bridge, Fengyu Bridge, Tiesuo Bridge, Wuyin Bridge, Yudai Bridge, Jinshui Bridge, Seventeen-hole Bridge and Jiangdong Bridge. bridge.