Helong is a county-level city of Yanbian Korean Autonomous Prefecture, Jilin Province. It is located in the southeast of Jilin Province and the south of Yanbian Korean Autonomous Prefecture. It is located at the eastern foot of Changbai Mountain and the north bank of the upper reaches of Tumen River. It borders Longjing City in the east, Antu County in the west, Longjing City and Antu County in the north, and north Hamjingbei Road and Yanggang Road of the Democratic People's Republic of Korea across the Tumen River. Population 314,995 (end of 2011), most of whom are ethnic Koreans, accounting for 51.53% of the total population. An area of 5,068.62 square kilometers (2013).
In 2015, Helong achieved a GDP of 5.45 billion yuan. Helong City is known as the "town of song and dance", "hometown of Jindalai" reputation. In 1883, the government of the Qing Dynasty and the Joseon Dynasty signed the Local Regulations for Traders and Traders in Jilin. The name "Helongyu" first appeared in the Regulations, and "Helongyu" in Manchu means "valley".

Located in the hinterland of Northeast Asia economic circle, Helong is a fulcrum of China in the "Golden Triangle" of Tumen River region formulated by the United Nations. In the east, it is only 60 kilometers away from the China-Russia border and 80 kilometers away from the Sea of Japan. It is more than 10 kilometers to the south from the China-DPRK border.
In November 2016, Helong City of Yanbian Korean Autonomous Prefecture was named the second batch of national all-region tourism demonstration zone by the National Tourism Administration. In December 2017, the State Ethnic Affairs Commission named the fifth batch of national demonstration zones for ethnic unity and progress.