Langfang postal code

1, 1 and 2 digits: representing provincial administrative divisions, and 06 representing Hebei Province.

2. The third digit: postal area, where 5 represents a specific postal area.

3. Fourth place: generally refers to prefecture-level cities or county-level cities, 0 does not refer to specific counties/cities here, but uses the combination of the previous ones to identify Langfang City.

4. 5th and 6th digits: usually used to refine to smaller delivery parts, where 00 may represent the general delivery area of Langfang.