By Severin.stalder, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=39661035 The Great Wall of China is a series of fortifications built by the first Chinese emperor Qin Shi Huang in 220 - 206 BC and it was biult with stone, brick, tamped earth, wood, and other materials,  along the east-to-west line across the historical northern borders of China. The Great Wall extends from