Hailun is a county - level city under the jurisdiction of Suihua City. For the black land conservation use pilot area, resident Helen Town. Hailun City is located in the central part of Heilongjiang Province, north of Suihua City, south of Suihua City, north of Bei 'an City, south of Harbin City 214 kilometers, north of Heihe City 376 kilometers, west of Qiqihar City 268 kilometers. It covers an area of 4667 square kilometers and an area of arable land of 4.41 million mu. Jurisdiction over 13 towns, 10 townships. According to the seventh census data, as of midnight on November 1, 2020, the permanent population of Hailun was 480,216.

Hailun City enjoys the reputation of "Six Towns", the hometown of high-quality soybeans, the hometown of high starch corn, the hometown of Sweet mushroom girl, the hometown of Chinese folk art, the hometown of beet and the hometown of seed goose. It is the selenium capital of black soil in China and an important national commodity grain base county.

In March 2014, Hailun City was selected as one of the first national demonstration cities of new energy. In November 2019, Hailun City was named as the national model county of "Four Good Rural Roads". In November 2019, it was selected into the list of the second batch of counties (districts) that reached the standard of water-saving social construction. On February 26, 2020, Hailun City took off its hat and withdrew from the poverty-stricken county.
In 2020, Hailun's GDP (current price) reached 125.2752 million yuan, an increase of 1.6% over the previous year.