Youyi County, belonging to Shuangyashan City, Heilongjiang Province, is located in the northeast of Heilongjiang Province, with Fujin City in the east and north, Baoqing County across the Qixing River in the south, Shuangyashan City in the southwest and Jixian County in the west, with a total area of 1,696 square kilometers. In 2021, there are 51,711 households in Youyi County, with a total population of 104,300. As of October 2021, Youyi County has jurisdiction over 4 towns and 7 townships.
Shang and Zhou came to the Western Han Dynasty as a place of prudence. In 1960, Jixian County was abolished and Friendship County was established. In 1991, Friendship County was divided into Shuangyashan City.

In 2021, the GDP of Youyi County reached 4.295 billion yuan, an increase of 4.9% over the previous year. The added value of the primary industry was 1.841 billion yuan, and that of the secondary industry was 387 million yuan; The added value of tertiary industry was 2.066 billion yuan, and the composition of tertiary industry was 42.9:9.0:48.1.