Joke Collection Website - Public benefit messages - How long will it take to receive confidential postal documents?

How long will it take to receive confidential postal documents?

One day in the same city. Postal confidential documents take a long time to post, generally it takes only one day to express in the same city, two days in the province and three days outside the province. Postal service is a communication department managed by the state or directly engaged in delivering all kinds of mail (letters or articles).