Ögedei abolished the branch departments of state affairs and divided the areas of Mongol-ruled China into ten routes according to the suggestion of Yelü Chucai. He also divided the empire into Beshbalik and Yanjing administration, while the headquarters in Karakorum directly dealt with Manchuria, Mongolia and Siberia. Late in his reign, Amu Darya administration was established. Turkestan was administered by Mahamud Yalavach, while Yelu Chucai administered North China from 1229 to 1240. Ögedei appointed Shigi Khutugh chief judge in China. In Iran, Ögedei appointed first Chin-temur, a Kara-kitai, and then Korguz, an Uyghur who proved to be honest administrator. Later, some of Yelu Chucai's duties were transferred to Mahamud Yalavach and taxes were handed over to Abd-ur-Rahman, who promised to double the annual payments of silver. The Ortoq or partner merchants lent Ögedei's money at exorbitant rates of interest to the peasants, though Ögedei banned considerably higher rates. Despite it proving profitable, many people fled their homes to avoid the tax collectors and their strong-arm gangs.