The great wall of China first started as a wall made of hard earth was made by planks being parall next to each other allow the Earth to channel up causing a wall it was very quick and simple. All that was needed to be down was for a pensant to stand on the earth and mud being shoveled into the gap between the planks by another pesant and for the pesant standing on the earth or dirt to stomp i down. This is how a part of the great wall was made in only 12 years. Alothough millions of pesants died at the great walls consturction and sadly were forced into slavery. In total 1-3 Million! pesants were killed constructing this mad made wonder.