Three million people -- 70
percent of China's population at the time -- was involved in building the
Qin Wall.
The
death toll in the building of the first Great Wall was astounding: More than
a million people died building this 3,00 miles section more than 300 people
per mile.
It's estimated that for every
person building the Qin Great Wall, another six were needed to provide
building materials and supplies.