用户名：gaominzhang
TheGreatWallofChinaisaseriesofstoneandearthenfortificationsinnorthernChina,builtoriginallytoprotectthenorth来自ernborderso问答ftheChineseEmpireagainstintru友团处利汽家sionsbyvariousnomadicgroups.Severalwallsh**ebeenbuiltsincethe5thcenturyBCthatarereferredtocollectivelyastheGreatWall,whichhasbeenrebuiltandmai银犯药ntainedfromthe5thcenturyBCthroughthe16thcentury.Oneofthemostfamousisthewallbuiltbetween220–206BCbythefirstE音装墓香双于际mperorofChina,QinS诉内延六白与占hih**uang.Littleofthatwallremains;themajorityoftheexistingwallwasbuiltd操么领基按频坚映领拉们uringtheMingDynasty.
TheGre继atWallstretchesfromShanhaiguanintheeast,toLopL**eint朝静实烈被黑短跑尼裂预hewest,alonganarcthatroughl围夫阻构背孩ydelineatesthesouthern专达显台位保edgeofInnerMongolia.Themostcomp溶费诗rehensivearchaeologicalsurvey,usingadvancedtechnol新消测者营白扩沉贵ogies,hasconcludedthatallthew活allsmeasure8,851.8km(5,500.3m).Thisismadeupof6,259.6km(3,889.5m)sectionsofactualwall,359.7km(223.5m)oftrenchesand2,232.5km(1,387读面稳备.2m)ofnaturaldefensivebarrierssuchashillsandrivers.
