As East Asian countries began to develop its silk trade with the West, Persian cities took advantage of this commerce by becoming centres of trade. Using an extensive network of cities and rural settlements in the province of Transoxiana, and further east in what is today China's Xinjiang Uygur Autonomous Region, the Sogdian intermediaries became the wealthiest of these Iranian merchants. As a result of this trade on what became known as the Silk Route, Bukhara and Samarkand eventually became extremely wealthy cities, and at times Transoxiana (Mawarannahr) was one of the most influential and powerful Persian provinces of antiquity.