Postal code of guannan county: 223511.

guannan county, which belongs to Lianyungang City, Jiangsu Province, is located in the northeast of Jiangsu Province, in the south of Huanghuai Plain, bordering Xiangshui County in the east, Lianshui County in the south, Shuyang County in the west and Guanyun County across Xinyi River in the north. It is the south gate of Lianyungang City with a total area of 1,129.88 square kilometers. By June, 2121, there are over 11 towns under the jurisdiction of guannan county.

Guannan was called "Haixi" in ancient times, also known as "Hui Ze", which was named because it was located in Guanhe River Basin and south of Guanyun County.

In October, 1957, the State Council passed the "Decision on Setting up guannan county in Jiangsu Province". On March 1, 1958, Guannan County was completed and officially started to work.

a large number of revolutionaries such as Hui Yuyu, Hui Zhou, Rui Xingwen and Tang Shuhong were born in Guannan, and many literary masters such as Wang Xiaogu, Wang Yongmei and Ji Daoqing were cultivated. Water transport culture, Grand Canal culture, red culture and westward journey culture blend and reflect each other.

Guannan is a civilized city in Jiangsu province and a city nominated by the national civilized city. It has been awarded as a national sanitary city, a national model county for greening, a national demonstration zone for the quality and safety of exported food and agricultural products, a national comprehensive demonstration county for e-commerce in rural areas, and a national demonstration county for the industrialized production of edible fungi.

Tanggou liquor, a famous specialty, is a Chinese time-honored brand, a national geographical indication product and a national quality certification inspection-free product, and was awarded the gold medal in China Famous Wine Expo.