Liancheng County, a county under the jurisdiction of Longyan City, Fujian Province, is called "Liancheng" for short. It is located in the southern section of Wuyi Mountain in the western mountain area of Fujian Province, and at the junction of Fujian, Guangdong and Jiangxi provinces. The county borders Yong'an City and Xinluo District in the east, Shanghang in the south, Changting in the west, and Qingliu in the north. The total area is 2579 square kilometers. At the end of 2018, it had jurisdiction over 17 towns and townships, and the local dialect of Minxi Hakka was popular.

According to the Minutes of Reading History, the Lotus Castle was built in Fujian (1098-1100) of the Song and Yuan Dynasties, belonging to Changting County; In the third year of Shaoxing (1133), Liancheng County was established, which was named after Lianfeng Mountain in the east of the county; In the sixth year of the Zhizheng era of the Yuan Dynasty (1346), it was renamed Liancheng, and it was under the jurisdiction of Tingzhou, Tingzhou Road, Tingzhou Mansion and Tingzhang Road; From 1929 to 1934, the county Soviet government was established successively in Xinquan and Lianfeng, and was once renamed Mingguang County; In 1938, Fujian Provincial Anti-Enemy Support Association moved to Liancheng; It was liberated on November 6, 1949 and is under the jurisdiction of Longyan District (region) and Longyan City.

Liancheng County is an old revolutionary base and a famous Hakka cultural city. It is one of the settlements and birthplaces of Hakka people. It is not only a key area for the development of Fujian's economic zone on the west side of the Straits in depth, but also an important transportation hub connecting the mainland with the coast; It has the honorary titles of "China's Excellent Tourism County", "China's Hometown of Sweet Potato", "China's Hometown of Liancheng White Duck", "China's Hometown of Wushu" and "China's Famous Hakka Food City". In 2019, the "top ten" counties (cities) in Fujian province's county economic development. In April 2020, it will meet the conditions for poverty alleviation and exit from the provincial key counties for poverty alleviation and development.

According to the data of the seventh population census, as of 0:00 on November 1, 2020, the permanent population of Liancheng County was 250518.

In 2021, the total GDP of Liancheng County was 29.435 billion yuan, up 8.0% year on year.