Xiaohaizi Township, Inner Mongolia Autonomous Region, Ulanqab City, Shangdu County township, located in the southeast of Shangdu County, east and Zhangjiakou City, Hebei Province, Shangyi County, Sanhedi Township as a neighbor, south and Xinghe County, Sai Wusu Township connected to the west and the town of Qitai adjoining the town of northern cross eighteen hectares of the town, the administrative area of 452.04 square kilometers. Before 1962, it was assigned to Zhangbei County, Zhangjiakou City, Hebei Province; in 1962, it was assigned to Shangdu County; in June 2001, Xiaohaizi Township was changed to a town. As of the end of 2018, Xiaohaizi Township had a household population of 35,958. As of June 2020, Xiaohaizi Township has 28 administrative villages under its jurisdiction. In 2011, the per capita net income of farmers in Xiaohaizi Town was 2,200 yuan.In 2018, there were 8 industrial enterprises in Xiaohaizi Town, of which 1 was above scale, and there were 10 comprehensive stores or supermarkets with business area of more than 50 square meters.