 In the 24th year of the regime of Wu Yi, Zhou attacked Cheng (程) at Bi (毕) and defeated Bi.In the 30th year, Zhou attacked Yiqu (义渠) and captured the king of Yiqu.According to Sima Qian, the King of Yiqu has two sons by different mothers; after the king died, they fought each other for throne only to have Zhou defeat them both and absorb the territory of Yiqu.