premise: Qin dynasty started in China.
hypothesis: The Qin dynasty was the first dynasty of Imperial China , lasting from 221 to 206 BC . Named for its heartland of Qin , in modern-day Gansu and Shaanxi , the dynasty was formed after the conquest of six other states by the Qin state , and its founding emperor named Qin Shi Huang , the First Emperor of Qin . During its reign over China , the Qin sought to create an imperial state unified by highly structured political power and a stable economy able to support a large military .