well china built a wall to keep the The bads guys out the Mongolia but that did not work out they went over it. and sorry but one of the kings died and wear they buried him their out of clay
hears what i got better explainatoin
Buried deep under a hill in central China, surrounded by an underground moat of poisonous mercury, lies an entombed emperor who's been undisturbed for more than two millennia.
The tomb holds the secrets of China's first emperor, Qin Shi Huang, who died on Sept. 10, 210 B.C., after conquering six warring states to create the first unified nation of China.
The answers to a number of historical mysteries may lie buried inside that tomb, but whether modern people will ever see inside this mausoleum depends not just on the Chinese government, but on science.
