2. Qing Xiling Mausoleum in Baoding. Qing Xiling Mausoleum is located at the foot of Yongning Mountain 15km west of Yixian County, Baoding City, Hebei Province, and more than 20 km away from Beijing120. Qing Xiling Mausoleum is the mausoleum of four emperors in Qing Dynasty since Yongzheng, which was built in the eighth year of Yongzheng (1730). There are 14 mausoleums in Xiqing Mausoleum, including Tailing Mausoleum in Yongzheng, Changling Mausoleum in Jiaqing, Muling in Daoguang and chongling in Guangxu, and three later mausoleums. In addition, there are 14 Wang Huailing, Princess Mausoleum, Argo Mausoleum and Wang Yeling Mausoleum. Its architectural form embodies the laws and regulations of feudal system, and the mausoleum and Hou Ling are covered with yellow glazed tiles. The gardens of concubines, princesses and princes are all covered with green glazed tiles or gray cloth tiles. Qing Xiling covers an area of more than 800 square kilometers. There are more than 1000 palace buildings and more than 100 ancient buildings and sculptures in the mausoleum area.
3. Shanhaiguan in Qinhuangdao. Shanhaiguan, also known as Guan Yu, Guan Yu and Lu Linguan, is located in the northeast of Qinhuangdao City, Hebei Province 15km, and is one of the northeast passes of the Great Wall of Ming Dynasty. Before 1990, it was considered as the starting point of the eastern end of the Great Wall in Ming Dynasty, and it was also known as the "Three Wonders" of the Great Wall in China (Shanhaiguan in the east, Zhenbeitai in the middle and Jiayuguan in the west). In the 14th year of Hongwu in Ming Dynasty (138 1 year), the city was built, the customs were built and the guards were set up, so it was named Shanhaiguan. Shanhaiguan city is about 4 kilometers in circumference, connected with the Great Wall and taking the city as the gateway. The city is 14 meters high and 7 meters thick, with four main doors and various defensive buildings. Including "the first pass in the world" Arrow Tower, Jingbian Tower, Muying Tower, Lulin Tower, Wengcheng and 1350-meter-long Great Wall of the Ming Dynasty Plain.