Jiang Wei prided himself on his familiarity with the cultures and customs of the Qiang and other non-Han Chinese tribes living in western China. As such, he often thought of inducing these tribal peoples to ally with Shu and launch a coordinated attack on the Wei-controlled territories in present-day Gansu. However, Fei Yi, the Shu regent, strongly disapproved of Jiang Wei's warmongering behaviour towards Wei, and attempted to rein Jiang Wei in by limiting the number of troops he led into battle each time to no more than 10,000. He once told Jiang Wei that they should stop attacking Wei and focus on policies promoting internal stability and prosperity in Shu.