Yunmengshan Great Wall Ruins Park is more than 90 kilometers away from downtown Beijing, along the Miyun Reservoir in the east and the Yunmeng Mountains in the west. The park is located on the eastern edge of Yunmeng Mountain. The mountains are beautiful and natural, with undulating and exquisitely designed peaks, often hidden in the clouds. It is known as the "Huangshan Mountain in the North". Among the existing Great Wall ruins in the park, some sections were built during the Northern Qi Dynasty; while most of them were built in the early Ming Dynasty. The Great Wall is a pure stone structure single-sided inner Great Wall, stretching from the northeast to the southwest, just like a majestic stone dragon, floating on the undulating mountain tops. The park organizes large-scale Mid-Autumn Moon Appreciation Festival, Golden Autumn Chestnut Festival, Double Ninth Festival Climbing Festival and other activities every year. Climbing high and looking far away is refreshing. The panoramic view of Miyun Reservoir in the east is in full view, and the Yunmeng Canyon in the west is in full view. Yunmengshan Great Wall Ruins Park is more than 90 kilometers away from downtown Beijing, along the Miyun Reservoir in the east and the Yunmeng Mountains in the west. The park is located on the eastern edge of Yunmeng Mountain. The mountain is beautiful and natural, with undulating and exquisite design. The peaks are protruding and often hidden in the clouds. It is known as the "Huangshan Mountain in the North". Beijing Yunmengshan Great Wall Ruins Park is located more than 90 kilometers northeast of Beijing and west of Miyun Reservoir, covering an area of more than 7,000 acres. It is located on the eastern edge of Yunmeng Mountain. The mountain is beautiful and natural, with peaks protruding and often hidden in the clouds. It is known as the "Huangshan Mountain in the North". It is said that some sections of the existing Great Wall ruins belong to the Northern Qi Dynasty; most of them were built in the early Ming Dynasty and belong to the west of the three routes of the east, middle and west of the Jizhen border wall. The Shitangling section starts from Shitangling in the north and ends at Kailiankou in the south. It is 92 miles long and has 12 pass forts, 3 wall towers, and 59 hollow enemy towers. It was first built during the Hongwu and Yongle years, and was repaired and rebuilt during the Longqing and Wanli years. The walls of the Yunmengshan Great Wall Ruins Park are mostly built with rocks, filled with rammed earth, and stacked with battlements on the outside; stone strips are piled under the enemy tower, and blue bricks are laid on top; the fortress city is placed at the key point of land and water. In the Qing Dynasty, only the fortress city was used and the Great Wall fell into disrepair. The upper half of the wall is mostly incomplete, adding a bit of vicissitudes; however, the lower half is mostly preserved intact, winding and undulating between the valleys, and has been integrated with it, and it is not allowed to be slightly modified. The southern Shuigu Mountain of Baihe is also called Diliugua Mountain. The cliff faces west, and the wall is winding from north to south according to the situation. It is connected with three enemy towers such as Sandao Bianlou, Jiangjunlou, and Sifanglou, as well as a circular beacon tower. It is now called Sizuolou Mountain. The Great Wall of Yunmeng Mountain Great Wall Ruins Park crosses Qingxi River in the south (now called Yunmeng Gorge), and the ruins of Dongshuigu Pass and Gushui Pass still exist (about six miles south of Lilin Resort). During the reign of Emperor Kangxi of the Qing Dynasty, Fan Chengxun, the 19th grandson of Fan Zhongyan, a famous minister of the Song Dynasty and the Minister of War, retired and "climbed to the top of the mountain with a few strategies to see its magnificent atmosphere and complete city walls". He chose to build Qingxi Villa in the north of Qingdian Stream (in the reservoir area of about six miles east of Lilin Resort). Today, the city walls of the mountain stream can be vaguely discerned, and the grand view of Miyun Reservoir can be seen. Among the existing Great Wall ruins in Yunmeng Mountain Great Wall Ruins Park, some sections were built during the Northern Qi Dynasty; and most of them were built in the early Ming Dynasty. The Great Wall is a pure stone structure single-sided inner Great Wall, stretching from the northeast to the southwest, just like a majestic stone dragon floating on the undulating mountain tops. Every year, the park organizes large-scale activities such as the Mid-Autumn Moon Appreciation Festival, the Golden Autumn Chestnut Festival, and the Double Ninth Festival. Climbing high and looking far away is refreshing. The panoramic view of Miyun Reservoir in the east and the Yunmeng Canyon in the west are all in sight.