Great Wall of Qi, Great Wall of China

The Great Wall of Qi is the oldest existing Great Wall in China. Construction of the wall started in 441 BC by the state of Qi, to defend itself against attacks from the states of Jin and Yue. Construction ended during the Warring States period and became Qi's defense against enemies states like Ju, Lu, and Chu. The wall stretches from Guangli village of today's Changqing District, Jinan, running across the mountain ridges of central Shandong Province to the Yellow Sea in the present-day city of Qingdao. Its total length has been estimated at about 600 kilometers. Most of the wall is still able to be seen. ()