All States sought the way to be prominent by reforming in Warring States period. Duke Xiao of Qin employed Shang Yang to enact numerous reforms which helped Qin to have great foundation to unify states by agriculture and military power. This reform was the turning point for Qin to be powerful and strongly centralized kingdom. After King Qin Huiwen ruled the state of Qin, he kept executing this reform which focused on agriculture to develop the Guanzhong Plain and then got the territory of Basu and Hanzhong. He also outreached the territory of Qin by annexing others'. Since Qin established its fundamental state tactic, developing agriculture, the following successors had kept having victories on wars and bringing the tactic to the new lands. Furthermore, they, the following successors, had been controlling and reinforcing the new lands efficiently for about 100 years. Afterwards, King Zheng of Qin unified six states into a state. Wei Wu described that ”Qin annexed, unified and ruled the states by agriculture”.