 There is some evidence that the Ming eunuch Admiral Yishiha reached Sakhalin in 1413 during one of his expeditions to the lower Amur, and granted Ming titles to a local chieftain.Under the Ming dynasty, commerce in Northeast Asia and Sakhalin was placed under the "system for subjugated peoples", or "ximin tizhi".This suggests that the island was at least nominally under the administration of the Nurgan Regional Military Commission, which was established by Yishiha near today's village of Tyr on the Siberian mainland in 1411, and continued operating until the mid-1430s.