After the Mongol conquest by Genghis Khan, foreigners were chosen as administrators and co-management with Chinese and Qara-Khitays (Khitans) of gardens and fields in Samarqand was put upon the Muslims as a requirement since Muslims were not allowed to manage without them [REF].
Han Chinese officials and colonists were sent by the Mongol Yuan dynasty to areas of Lingbei province (和宁路 益蘭州 謙州) [REF].