AsoneofthesymbolsofChina,theGreatWallisawondernotonlytoChinabutalsotothewholeworld.TheGreatWallwasfirstbuiltintheSpringandAutumnPeriodandtheWarringStatesPeriod.AftertheunificationofChina,thefirstEmperorofQinlinkedupdifferentsectionsofthewallstopreventtheinvasionoftheenemies.ThepresentpreservedGreatWallofChinaisthemajorpartsbuiltinthe14thcentury,calledMingGreatWall.Withalonghistoryofmorethan2,000years,theGreatWallofChinawaslistedasWorldHeritagebyUNESCOin1987.Untilnow,theGreatWallisstilloneofthemostpopularattractionsintheworld.