Administrative division of Inner Mongolia, China
In Inner Mongolia, China, a sum or sumu is a township-level political/administrative division. The sum division is equivalent to a township but is unique to Inner Mongolia. It is therefore larger than a gaqa (village) and smaller than a banner (the Inner Mongolia equivalent of the county-level division). Examples include Shiwei, Inner Mongolia and Honggor Sum, Siziwang Banner.
Sum whose population is predominated by ethnic minorities are designated ethnic sum – parallel with the ethnic township in the rest of China. As of 2010[update], there is only one ethnic sum in China, the Evenk Ethnic Sum. The Enhe Russian Ethnic Township of Inner Mongolia is not called sum.