Sum (country subdivision)
In Inner Mongolia, a sumu (Mongolian: ᠰᠤᠮᠤ, transliteration: sumu; Chinese: 苏木, pinyin: sūmù) is a township-level political/administrative division. The sumu division is equivalent to a township but is unique to Inner Mongolia. It is therefore larger than a gaqa (Mongolian: ᠭᠠᠴᠠᠭᠠ гацаа) and smaller than a banner (the Inner Mongolia equivalent of the county-level division).
Sumu whose population is predominated by ethnic minorities are designated ethnic sumu – parallel with the ethnic township in the rest of China. As of 2010, there is only one ethnic sumu in China, the Evenk Ethnic Sumu.
A sum (Mongolian: сум) is the second level administrative subdivision below the Aimags (provinces), roughly comparable to a County in the United States. There are 331 sums in Mongolia. Each sum is again subdivided into bags.