It was believed that more than 700,000 laborers/slaves and prisoners or war worked on the tomb and they were killed when the work was finished as not to divulge
the secrets of the mausoleum (Travel Advisor).
Shi Huangdi stories suggest that his body lies on a gold bed, wrapped in silver, in a dragon-shaped copper coffin where is sits in a bejeweled model of the known world with rivers and seas of mercury beneath a ceiling dripping with gemstones. However, until archaeologists open the tomb the contents of Shi Huangdi’s resting place will remain the stuff of legend (China Daily, 2004).
Since it is believed that a mercury river surrounds the tomb, no one wants to dig to the tomb due to the mercury that is said to surround the tomb.
Per our text book, it is believed that the emperor was buried there in a bronze casket and magnetic scans of the tomb have also revealed large numbers of coins, suggesting the emperor was buried with his treasury (Sayre, 2011. Pg. 223).
During the Qin Dynasty the Great Wall of China was built which was originally built to discourage nomadic invaders from the north which started from the Yellow Sea east of the modern Beijing far into Inner Mongolia (Sayre, 2011. Pg. 220).