Postal four business is which four

(I) Mail delivery. Mail delivery is for people to pass information carriers and items of business, it is the postal industry's traditional business and the main business. Although there has been a postal system in China for a long time, it was not until the end of the 19th century that mail delivery was really opened to the public in China.

In the domestic mail, mail delivery business can be divided into the following categories: (1) letters, including letters, postcards, printed matter, blind readers and other items. (2) Parcels, which can be categorized into civil parcels, paper parcels, commodity parcels, large commodity parcels and other categories. (3) Express mail, which can be divided into the categories of letters, documents and materials, and articles.

In the international mail, mail delivery business can be divided into the following categories: (1) letters, including letters, postcards, airmail briefs, printed matter, small packages, blind readers and other items. (2) Special business, including air, registered, confirmed delivery, express, return receipt, deposit bureau waiting for collection, insured letters and so on. (3) Parcels, which can be categorized into different types of parcels such as ordinary parcels, insured parcels and fragile parcels.

(2) postal remittance, postal savings. Since the postal reform, China's postal exchange business and postal savings business have been handed over to the China Postal Savings Bank.

(3) Issuance of stamps as well as production and sale of philatelic stamps.

(4) Domestic newspaper, books and other publications distribution.