the great wall was builtgreat wall of china206 - 220 bc the great wall was built by the first emperer of china Qin Shi Huang.
Period: 200 to
First Chinese EmperoFrom 246 B.C to 221 B.C, During the Warring States Period Shi Huangdi was king of the State of Qin. He became the first emperor of a unified China in 221 B.C
Jan 19, 600
first use of the crossbow
berial of the terra cotta armyIt's estimated the tomb took about 38 years to build, they were over 700,000 conscripts indside. it was built between 247 and 208 B.C.
gunpowder was inventedGunpowder is an explosive mixture of saltpeter (potassium nitrate), sulfur, and charcoal. The history of it goes back to A.D. 850 in China. Gunpowder was most likely created by Chinese alchemists (people attempting to produce gold artificially, by combining other substances).