The Great Wall, also known as the Great Wall of Wan Li, is an ancient military defense project in China. The history of building the Great Wall can be traced back to the Western Zhou Dynasty, from which the famous allusion "the bonfire plays princes" originated. During the Spring and Autumn Period and the Warring States Period, countries competed for hegemony and defended each other, and the construction of the Great Wall entered its first climax, but the construction length at this time was relatively short. After Qin destroyed the six countries and unified the world, Qin Shihuang connected and repaired the Great Wall of the Warring States Period, which was called the Great Wall of Wan Li. The Ming Dynasty was the last dynasty to overhaul the Great Wall, and most of the Great Wall seen by people today was built at this time.

Great Wall resources are mainly distributed in Hebei, Beijing, Tianjin, Shanxi, Shaanxi, Gansu, Inner Mongolia, Heilongjiang, Jilin, Liaoning, Shandong, Henan, Qinghai, Ningxia, Xinjiang and other provinces, autonomous regions and municipalities. According to the results of the national Great Wall resources survey conducted by the cultural relics and surveying and mapping departments, the total length of the Great Wall in Ming Dynasty was 885 1.8km, and that in Qin and Han Dynasties and its early period was more than 1, 000km, and the total length was more than 2 1, 000km.

1961March 4th, the Great Wall was announced by the State Council as the first batch of national key cultural relics protection units [3]. 1987 65438+February, the Great Wall was listed as a world cultural heritage.

The Summer Palace

The Summer Palace, an ancient imperial garden in Beijing, formerly known as Qingyi Garden, is located in the western suburbs of Beijing, 0/5 km away from the urban area/kloc-,covering an area of about 290 hectares, and adjacent to Yuanmingyuan. It is a large-scale landscape garden with Kunming Lake and Wanshou Mountain as the background and Hangzhou West Lake as the basis, drawing lessons from the design techniques of Jiangnan gardens. It is also the most well-preserved royal palace, known as the "Royal Garden Museum" and a national key tourist attraction.

Before the Qing Emperor Qianlong succeeded to the throne, there were four large royal gardens in the western suburbs of Beijing. In the 15th year of Qianlong (1750), Emperor Qianlong rebuilt Qingyi Garden here with 4.48 million taels of silver, forming a royal garden area 20 kilometers long from Tsinghua campus to Xiangshan. In the tenth year of Xianfeng (1860), Qingyi Garden was burned by the British and French allied forces. In the 14th year of Guangxu (1888), it was rebuilt and renamed the Summer Palace as a summer amusement park. In the 26th year of Guangxu (1900), the Summer Palace was destroyed by "Eight-Nation Alliance" and its treasures were looted. After the demise of the Qing Dynasty, the Summer Palace was destroyed again during the period of warlord melee and Kuomintang rule.

196 1 On March 4th, the Summer Palace was announced as the first batch of national key cultural relics protection units. Chengde mountain resort, Humble Administrator's Garden and Lingering Garden, which were announced at the same time, are also called the four famous gardens in China, and were listed on the World Heritage List in June1998+0/kloc-0. On May 8, 2007, the Summer Palace was officially approved by the National Tourism Administration as a national 5A-level tourist attraction. In 2009, the Summer Palace was selected by world record association of China as the largest existing royal garden in China.