During the Warring States Period, Qin Xiaogong, king of Qin, was determined to reform and recruit talents. From Wei to Qin, Shang Yang put forward a set of reform and innovation development strategies, such as abandoning ore fields, emphasizing agriculture and mulberry, rewarding meritorious military service, implementing unified quantity and establishing county system, which won the trust of others and made it a long-term leader. In 356 BC and 350 BC, "abandoning mining fields, building buildings, implementing county system, rewarding farmers and practicing sitting method" were implemented twice.
After Shang Yang's political reform, Qin's economy developed, and the fighting capacity of the army continued to strengthen, and it developed into the most prosperous feudal country at the end of the Warring States Period.