Great Wall of China Great Wall of China The Great Wall of China is a series of fortifications made of stone, brick, tamped earth, wood, and other materials, generally built along an east-to-west line across the historical northern borders of China to protect the Chinese states and empires against the raids and invasions of the various nomadic groups of the Eurasian Steppe with an eye to expansion. Several walls were being built as early as the 7th century BC; these, later joined together and made bigger and stronger, are collectively referred to as the Great Wall. Especially famous is the wall built in 220–206
Great Wall of Qi total length has been estimated at about 600 kilometers. Most of the wall is still able to be seen. Great Wall of Qi The Great Wall of Qi () is the oldest existing Great Wall in China. Construction of the wall started in 685 BC (during the Spring and Autumn period) by the state of Qi, to defend itself against an invasion by the Kingdom of Chu. The existing sections date back to 500 BC. Construction ended during the Warring States period. The wall stretches from the areas under the administration of the present-day city of Jinan to the present-day