Lulong County, a county directly under the financial management of Hebei Province, is subordinate to Qinhuangdao City, Hebei Province. It is located in the east of Hebei Province and the west of Qinhuangdao City, between 118 ° 45'54 "~119 ° 08'06" east longitude and 39 ° 43'00 "~40 ° 08'42" north latitude. It borders Funing District in the east, Changli County and Beijing Shenyang Railway in the south, Qian'an City and Luanzhou City of Tangshan City across Qinglong River and Luan River in the west, and Qinglong Manchu Autonomous County adjacent to the Great Wall in the north, with a total area of 961 square kilometers. The territory belongs to temperate continental monsoon climate zone. As of June 2020, Lulong County has jurisdiction over 3 townships, 9 towns, 1 economic development zone and 548 administrative villages. The county people's government is located in Lulong Town. According to the data of the seventh census, as of 0:00 on November 1, 2020, the permanent population of Lulong County is 333942.

Lulong County gets its name because its northwest is adjacent to the ancient lacquer water (Qinglong River). During the Yin and Shang Dynasties, Lulong County was the capital of Guzhu State. It was first named Lulong County in the 18th year of Emperor Kaihuang of Sui Dynasty (598). During the Ming and Qing Dynasties, it was governed by Yongping Prefecture, which was known as the "First Prefecture in Jingdong" in history. In November 1958, Lulong County was abolished, and Qian'an County and Changli County were under its jurisdiction. On May 20, 1961, the former jurisdiction of Xichangli and Qian'an counties was restored to Lulong County, which belongs to Tangshan. In May 1983, Tangshan was abolished and Lulong County was changed to Qinhuangdao City. The historical allusions of such idioms as "Old Horse Knows the Way" and "Stone is the Open" come from Lulong. There are more than 20 famous cultural relics and historic sites in the county, which have been named as "the hometown of Chinese bamboo culture", "the millennium ancient county", "the education base of Chinese traditional culture" and "the hometown of Chinese poetry".

In 2019, Lulong County completed a GDP of 11.517 billion yuan, an increase of 7.2% over the previous year at comparable prices. By industry, the added value of the primary industry was 3.582 billion yuan, up 3.5%; The added value of the secondary industry was 2.851 billion yuan, up 6.6%; The added value of the tertiary industry was 5.084 billion yuan, up 10.2%.