According to the postcode database, the postcode of Yunhe District of Cangzhou City is 06 1000. The first two digits 06 represent Hebei Province, the third digit 1 represents Cangzhou City, the fourth digit 0 represents Cangxian County, and the last two digits 00 represent the delivery area.

Cangzhou City is a prefecture-level city under the jurisdiction of Hebei Province, located in the Heilonggang River Basin in the southeast of Hebei Province and the east of Hebei Plain, bordering Bohai Sea in the east, Tianjin and Langfang in the north, and Baoding and Hengshui in the west and southwest respectively.