Longhai District (Longhai City), under the jurisdiction of Zhangzhou City, Fujian Province, is located in the southeast of Fujian Province and the east of Zhangzhou City, with a total area of 1190.97 square kilometers. By the end of 2019, the permanent population was 963100, and the total registered residence population was 901600, including 45 ethnic minorities such as She, Miao, Tujia and Zhuang; By June 2020, it has jurisdiction over 1 street, 11 towns and 2 townships.

Longhai District is located in the southeast coast of Fujian Province, the estuary of the Jiulong River, the second largest river in Fujian Province, adjacent to the main urban area of Zhangzhou in the west, and adjacent to the Xiamen Bay Area in the east. It has the geographical advantage of "connecting the east with the west". It is the forefront of Fujian Province's reform and opening-up and cooperation with Taiwan, and also the "bridgehead" of the development of Xiamen and Zhangzhou in the same city. The urban area is 20 kilometers from the main urban area of Zhangzhou, forming a half-hour economic circle and life circle with Xiamen; The nearest distance to Xiamen is only 2 nautical miles. The urban passenger terminal is 19 nautical miles from Xiamen Terminal and 50 kilometers from Xiamen Airport; It is a national sanitary city, a county for the protection and utilization of revolutionary cultural relics, a county for the construction of a water-saving society, and a civilized city in Fujian Province.

In 2019, the total regional GDP of Longhai District was 1100457 billion yuan, up 6.9%. Among them, the added value of the primary industry was 7921.6 billion yuan, the added value of the secondary industry was 64.17697 billion yuan, the added value of the tertiary industry was 37.9477 billion yuan, and the per capita GDP reached 114660 yuan.