On July 27, 2017, the weather is very good. Take the subway to Dongzhimen in the morning, walk to Dongzhimen bus hub, and then take 916 to Huairoubei Street. The ticket price is 12 yuan, and brush the Beijing Municipal Bus Card for 6 yuan, about one and a half hours. Take a taxi from Huairoubei Street to Mutianyu Great Wall Ticket Office for 50 yuan, about half an hour. If you are physically able, you only need to buy 40 yuan and ferry tickets to go there. It took us only half an hour to walk slowly to enemy building No. 6. It wasn't too tired, so we went to the top of the Great Wall. We arrived at the top of the Great Wall at 10:30 and took a rest while walking until we reached the enemy building No. 23. Then we went on to arrow-button the Great Wall. My brother took a short walk. At about 2 p.m., we started to return. We got down very quickly and returned by ferry. It was only 4:20 to Huairoubei Street by taxi. Seven people took a 70-yuan van. Then we returned to Beijing by 916.