Donglan County, affiliated to Heci City, Guangxi Zhuang Autonomous Region of the People's Republic of China, is located in the northwest of Guangxi, between 107°5 '-- 107°43' east longitude and 24°13 '-- 24°51' north latitude, on the southern margin of the Yunnan-Guizhou Plateau, in the middle reaches of the Hongshui River, with a total area of 2415 square kilometers. Donglan County is located in the monsoon climate zone between the middle and South Asian tropics. As of 2018, Donglan County has jurisdiction over 6 towns and 8 townships, with the county government stationed in Donglan Town. According to the seventh census, as of midnight on November 1, 2020, the permanent population of Donglan County was 219,549.

Song Chongning five years (1106), Natu returned to the court, Lanzhou, Wenzhou, is under the jurisdiction of Qingyuan Prefecture. In the Yuan Dynasty, Lanzhou was renamed East Lanzhou, which belonged to the Danxi Cave in the South of the Qing Dynasty and other military and civilian pacification department. In June 2002, Hechi area was changed into prefecture-level Hechi City, which belongs to Donglan County. Donglan County has a long history and rich resources, known as the "four townships" (longevity township, general township, bronze drum township, chestnut township) reputation.

In 2020, the gross regional product of Donglan County was 4.49 billion yuan, an increase of 4.3%, in which the added value of the primary industry was 1.178 billion yuan, an increase of 7.3%; The added value of the secondary industry was 457 million yuan, up by 16.2%; The value added of the tertiary industry was 2.855 billion yuan, up by 1.4%.