The postcode of Guanyun County is 222200. Postal code is a coding method that a country or region divides the whole country in order to realize the automation of mail sorting and the digitalization of postal network and speed up the delivery of mail. Postal coding system has become one of the standards to measure a country's communication technology and postal service level.

China postal code adopts four-level six-digit coding structure. The first two figures represent provinces (cities, autonomous regions); The first three digits indicate the postal area; The first four digits represent counties (cities); The last two digits indicate the office.

guanyun county

Guanyun County, which belongs to Lianyungang City, Jiangsu Province, is located in the northeast of Jiangsu Province and faces the Yellow Sea in the east. It is adjacent to Shuyang County of Suqian City and Donghai County of Lianyungang City in the west; Xinyi River in the south is adjacent to guannan county in Lianyungang City. It borders Haizhou District of Lianyungang City in the north, ranging from1192' 50 "east longitude to11952' 9" north latitude to 341'45 "-3438' 50" north latitude.

Guanyun County has a long history, and is known as "a blessed land in the East China Sea and a water town in the north" and "a scenic spot in the East and an ancient country in Shao Hao". As early as 6500 years ago, there were human beings here, which belonged to Quxian County in the Qin Dynasty and Haizhou Zhili Prefecture in the second year of Yongzheng in the Qing Dynasty.