Question

where is the most high wall and who built

Answer 1

The Great Wall of China is the longest in the world ,Average height: 6-7 meters (20-23 feet) .It was the state Chu who first built the wall. It was during the Qin Dynasty that the kingdom of Qin united the different parts into one empire. To defend off the invasions from northern invaders, Emperor Qin Shi Huang had all the walls joined up. Thus, the Great Wall came into being.