Datian Introduction: Datian County, nicknamed “Yancheng”, is a county under the jurisdiction of Sanming City, Fujian Province, located in the central part of Fujian Province and west of the Daiyun Mountain Range. It is between 25°29′-26°10′ north latitude and 117°29′-118°03′ east longitude. It is adjacent to Dehua in the east, Yongan in the west, Yongchun and Muping in the south, and Sanming, Shaxian and Youxi in the north. In the 14th year of Ming Jiajing (1535), Jian County was formed from Youxi, Dehua, Yong'an and Zhangping. The first name of the festival love, Xinmin, Jiajing forty-five years (1566) was renamed Datian County. Liberated in September 1949, under the Yong'an area, in September 1950, it was placed under the Jinjiang area, and in March 1963 it was changed to Sanming. There are more than 30 kinds of mineral deposits in the territory, among which the output of coal, iron and sulfur ranks first in Sanming. The reserves of limestone account for half of the city's total, and it has the reputation of “the treasure house in the middle of the city”. Datianshan has more fields, and it is called "Jiushan, Banshui, and Handan". It is surrounded by peaks and valleys, with 107 peaks above 1,000 meters, and the highest Daxian Peak is 1553 meters above sea level. The river flows east and west, and the south stream and the north Wenjiang River merge into the Minjiang River; the southwest Taoyuanxi and Shangjingxi pass through the Changping Lake and enter the Jiulong River. There are limestone caves such as “Baihedong”, “empty mountain” and “Huangyandong”. The county is a mid-subtropical monsoon climate with evergreen seasons and moderate temperature and humidity. The annual average temperature is 15.3--19.6 °C, the frost-free period is 280-300 days, the annual precipitation is 1491~1809 mm, the climate is mild, the rainfall is abundant, the soil is fertile, and it is suitable for the development of agriculture, forestry and animal husbandry. The crops are mainly rice, and the economic crops mainly include tea, soybean, sugar cane and peanut; the forest is dominated by pine. The country covers an area of ​​2,294 square kilometers, accounting for 1.89% of Fujian Province and 9.91% of Sanming City. In 1993, the county set up 5 towns, 13 townships, 265 administrative villages and 4 neighborhood committees. At the end of 2003, the registered population was 457,600, and the Han nationality accounted for the vast majority. There were 13 ethnic minorities including Hui, Manchu and Yi. Among them, the non-agricultural population is 179,100. Passing through the southern dialect of Daban.