57 1500 is the postcode of Wanning City, Sanya City, Hainan Province.

Postal code 57 1500 is not necessarily the most detailed postal code of all places under the jurisdiction of Wanning, Hainan, but it can meet the needs of ordinary mailing letters and articles to Wanning. The more detailed address below Wanning must be provided to the post office, and the more detailed postal code than 57 1500 is not needed. For example, the detailed postal code of a street in Wuhan, Hubei Province is 43002 1, but letters and articles with the postal code of 430000 in Wuhan, Hubei Province can be effectively delivered to all places under the jurisdiction of Wuhan, instead of having to be written as 43002 1 to be delivered correctly.