Mulan County, which belongs to Harbin City of Heilongjiang Province, is located in the north bank of the middle reaches of the Songhua River. It is named Mulan Da River within the territory. Mulan originates from the Manchu language "paddock" meaning. Between east longitude 127°3 '~128°18', from 45°54 '~46°36' north latitude, the total area of 3600 square kilometers. Mulan County climate is a temperate continental monsoon climate. As of October 2021, Mulan County has jurisdiction over 6 towns, 2 townships and 1 township unit. County people's government in Mulan town. As of midnight on November 1, 2020, the permanent population of Mulan County was 176,245.

In the pre-Qin period, Mulan County for Yemaek activity area. In 1997, Songhuajiang District Administrative Office was merged with Harbin City and placed under the jurisdiction of Harbin City. The main scenic spots are Xiangmo Mountain, camel peak, chicken Crown Mountain, poplar reservoir and other scenic spots. Mulan County was included in the list of the fourth batch of demonstration counties (cities and districts) that took the lead in basically realizing the whole-process mechanization of major crop production, and the list of counties (cities and districts) that basically balanced the development of national compulsory education in 2019.

In 2020, the GDP of Mulan County reached 8268.62 million yuan.