The Tannu Uriankhai were reorganized into an administrative system similar to that of Mongolia, with five khoshuns ("banner", 旗) and 46 or 47 sums ("arrow", 佐領) (Chinese and Russian sources differ on the number of khoshuns and sumuns). Each khoshun was governed by a magistrate (not hereditary) nominally appointed by the Qing military governor at Uliastai. In the latter half of the 18th century, the magistrate of Tannu Banner was placed in charge of the others as governor ("amban-noyon", 四旗總管) in recognition of his military service to the dynasty, until 1872.