The first Chinese Empire

Though the unified reign of the Qin Emperor lasted only twelve years, he managed to subdue great parts of what constitutes the core of the Han Chinese homeland and to unite them under a tightly centralized Legalist government seated at Xianyang (in modern Xian).
His sons, however, were not as successful; as soon as the Qin reign ended, the Qin imperial structure collapsed. The Qin Dynasty is well known for beginning the Great Wall of China, which was later augmented and enhanced during the Ming Dynasty .
The English word China was derived from the porcelain or ceramic ware originally made in China. The phonetic derivative was most probably introduced into the English language from Persian or Sanskrit terms for Chinese People ultimatey dlerived from ? (pronounced similarly to china)