欢迎来到中国的长城。长城是世界新七大奇迹之一，也是人类历史上最伟大的建筑之一。它始建于2000多年前的春秋战国时期，主要用于防御北方游牧民族的入侵。长城东起山海关，西至嘉峪关，全长约8851.8公里，因此被称为"万里长城"。今天我们将参观的是保存最完好的八达岭长城段。请跟随我一起探索这座举世闻名的古代军事防御工程。WelcometotheGreatWallofChina.TheGreatWallisoneoftheNewSevenWondersoftheWorldandoneofthegreatestarchitecturalfeatsinhumanhistory.Itsconstructionbeganover2,000yearsagoduringtheSpringandAutumnandWarringStatesperiods,primarilyasadefenseagainstinvasionsfromnorthernnomadictribes.Stretchingapproximately8,851.8kilometersfromShanhaiguanintheeasttoJiayuguaninthewest,itisknownasthe"Ten-Thousand-LiLongWall."Todaywewillvisitthebest-preservedsectionatBadaling.Pleasefollowmetoexplorethisworld-famousancientmilitarydefensesystem.
