Postal code 253600. According to the information on the official website of China Post, the postal code of Leling, Dezhou, Shandong Province is 253600. China’s postal code adopts a four-level six-digit coding structure. The first two digits indicate the province, municipality, or autonomous region, the third digit indicates the postal area, and the fourth digit indicates the postal code. The first digit indicates the county or city, and the last two digits indicate the delivery office.