Chinaboastsalonghistoryinbridgeconstruction.Withwoodandstoneasthemajorbuildingmaterials,Chineseancientbridgesvaryinformsandarehighlydistinct.ConstructedintheSuiDynasty,AnjiBridge,whichislocatedinZhaoCounty,HebeiProvince,istheoldestexistingbridgeinChina.AnjiBridge,alsonamedZhaozhouBridge,isakeynationalprotectedculturalrelicmeasuringalengthof50.82metersandawidthof9meters.InthelateyearsoftheQingDynasty,HuangheIronBridgeinLanzhouwascompleted,symbolizingthatChina’sbridgeconstructionsteppedintoaneraofadoptingsteelandconcreteasthemainmaterialsforbridges.Now,bearingmanyworldrecords,Chinastandsamongworldgiantsinbridgeconstruction.