Hello,visitors,may I have your attention please?I have something to tell you.This is the Great Wall,the famous interesting place in China.It's from Shan Hai Pass to Jia Yu Pass,about 10 thousand metres long.It was built during the Qin Dynasty,more than 2000 years ago.Now it's half past 9,and we'll stay here for 2.5 hours,and will leave at 12.The bus will wait for us at the entrance,and you should return on time.Please don't leave anything behind.Well,let's go!
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