Introduction to the site: The Great Wall of Qi was built by King Xuan of Qi during the Warring States Period and has a history of more than 2,300 years. The Great Wall is built along the top of the mountain. Where the high cliffs and steep walls are difficult to climb, short walls about two meters wide are built with stones. The ravines are built with huge stones, nearly 7 meters wide. Most of the sections are made of rammed earth and stone. Under the Qi Great Wall in Wulong Mountain, on the south side of Qilin Peak, there are more than 30 piles of rocks, as big as pillows and as small as goose eggs. The legend of Meng Jiangnu crying at the Great Wall happened here.