Why is there no zip code for "Stars and Poetry"?

Star Poetry is a literary magazine in Chinese mainland. It was published without a zip code. It may be because the magazine is a non-profit publication, or the publishing house has not applied to the local postal department for a mailing code.

Usually, the postal code is issued by the postal department, which is used to identify periodicals, newspapers and other publications that are mailed, which is convenient for the postal department to classify, distribute and deliver. Postal code can also play a propaganda role, so that readers can easily understand the source of publications and publishing information.

However, even if Selected Poems of Stars does not have a postal code, readers can still buy and read the magazine through publishing houses, bookstores and the Internet. Therefore, the absence of mailing code does not affect the publication and distribution of magazines.