The site of the Great Wall is located in the land of Qilu, which was built in the Spring and Autumn Period and has been more than 2,500 years since this time. From the Yellow River to the Yellow Sea to the east and west to the east, almost the entire north and south of Shandong are divided into two halves. After field measurements, the whole length of the Great Wall is618.893 kilometers, and a total of 1,518 peaks are overturned. Mainly there are sites such as Changqing Section, Tai'an Section, Laiwu Section, Wulian Section, etc., of which the best preserved Qiguo Laiwu Section is 57.832 kilometers.