Huaian belongs to Jiangsu Province. Huaian is located in the north-central part of Jiangsu Province, east of Jianghuai Plain. Located in the Yangtze River Delta, it is an important central city in northern Jiangsu, Nanjing metropolitan area is closely related to cities, and the first city in the Huaihe River eco-economic belt. It is located at the intersection of the ancient Huaihe River and the Beijing-Hangzhou Grand Canal, on the Huaihe River in Qinling Mountains, the north-south boundary of China, and has Hongze Lake, the fourth largest freshwater lake in China. It is a national civilized city. Huaian has a history of more than 2200 years. The Qin Dynasty was in this county, and there was a famous site of Qingliangang Culture. It used to be the hub of grain transportation and salt transportation, with the governor's office of grain transportation and the governor's office of Jiangnan River. I have made friends with Suzhou, Hangzhou and Yangzhou in history, and I know a lot about the small window protection of Yagi. Location of Huai 'an: Huai 'an is located in the central part of northern Jiangsu. It is located at 32 43 _ 00 "~ 34 06 _ 00" north latitude. Lianyungang City in the north, Yancheng City in the east, Yangzhou City and Chuzhou City in Anhui Province in the south and Suqian City in the west. The maximum linear distance from east to west 132km, the maximum linear distance from north to south 150km, and the area 10030km2. Huaian City is located in Huanghuai Plain and Jianghuai Plain, with no mountains and flat terrain. The landform is mainly plain, and only Xuyi County in the southwest of the city has hilly land with high terrain. Wuming Mountain in Qiuji Town, Xuyi County is 23 1 m above sea level, which is the highest point in the city.