nanjingxianIntroduction：Introduction to Nanjing: Nanjing County is known as Lanshui County, Yuanzhizhi 2nd Year (1322) is located in the county, and the county of Zhangzhou City, Fujian Province is in the south of Fujian Province, Jiulong River West Stream, east of Hua'an County, west of Yongding County. It is connected with Longyan City and Zhangping City in the north, Pinghe County in the south, and close to Wucheng District and Longhai County in the southeast. It is 60 kilometers wide from east to west and 80 kilometers long from north to south. The total land area is 1961.58 square kilometers, equivalent to 2,942,400 mu. In 1990, the county was divided into 6 townships, 4 towns, and a state-owned overseas Chinese farm, including 172 village committees, 8 operation areas, 9 residents committees, and 1915 villagers (jobs). The total number of households is 74,521, of which 66,090 are agricultural households. 328,245 people. Most of them are Han nationality and there are 17 574 ethnic minorities. Speaking in Minnan, Shuyang Town, and some villages in Meilin Town speak the language of the guests. County Chengshan Town, 36 kilometers away from Wucheng District, Zhangzhou City. More than 90 kilometers from Xiamen, 319 National Highway, Longlong Expressway and Longxia Railway pass through. There are three water systems, namely, Shipyard Creek, Longshanxi and Yongfengxi, which are connected to Xixi River in Jiulong. The county's forest coverage rate is 74%, which is known as the “tree sea” and “bamboo ocean”. There are more than 30,000 overseas Chinese and overseas Chinese, and more than 1 million Taiwanese compatriots in Nanjing are one of the key overseas Chinese hometowns and the ancestral homes of Taiwan. There are more than 15,000 earth buildings of various types, including more than 1,300 large-scale earth buildings, which can be called "the earth building kingdom" and "the hometown of earth building".