The history of China

let me show you history of China.The terra-cotta warriors.it is Chinese dynasty's army.i think it is symbolize the dynasty's power.
to many years ago ,have a Huangdi (like president).he want to that people make the army,if he died ,his ghost still was the Huangdi.so he catch the many people.use many years ,finished this built,but all people will be died,because the Huangdi don't let the person know where is he place.
so he kill the whole people.
why it's important ,may i gusess ,because it include many different method.