Do developers or properties need to pay any fees to the post office to install mailboxes uniformly in the new community?

According to the "Postal Law" and the "Measures for the Administration of Provincial Postal Services", "for newly-built houses and office buildings, the construction unit shall set up a mail room or a letter box to receive mail. The design standard of the letter and newspaper box shall conform to the national communication industry standard, and the cost shall be borne by the construction unit. " The management methods introduced by different provinces and cities are different, but this cost is really paid by the developer, and the basic cost of a mailbox is around 200.