Longcheng Town is located in the northeast of Qin 'an County, adjacent to Zhangjiachuan Hui Autonomous County in the east and Qingshui County in the south. It covers an area of 78.95 square kilometers, with 6,804 households, 3 1 and 37 1 person (end of 2008). It governs 22 administrative villages including Zhangjiagou, zhang wan, Wahuang, Shanwang, Zhangzhao, Chencun, Fengwei, Wangjiawan, Chang Ying, Xiguan, Longquan, Lueyang, Shangyuan, Nanqi, Toutu, Yinpo, Zhu Wei, Fan Lu, Shang Wei, Xudun, Jin Quan and Chongren. The town government is located in Huang Yu Village, 45 kilometers away from the county seat.

It is located at the junction of Sol Zhang, Qingshui and Qin 'an counties, on both sides of Dalong Mountain, and in the upper reaches of Qingshui River, with an altitude of1500-1900m, with an average altitude of1700m. It is a famous historical and cultural town in China. It is said that Fuxi and Nuwa were born in Longcheng, so they are called "the hometown of Huang Xi". Places of interest include Laihe Temple, Nuwa Cave, Qijia Cultural Site, Xifan Temple Site and the battlefield of the ancient street pavilion during the Three Kingdoms period. 1964 bronze forks and lanterns of the Qin dynasty were unearthed in Shangyuan village, which are precious cultural relics of the country.