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International Correspondence:

(1) no correspondence between private and real communications is allowed in letters other than letters.

(2) no printed or cancelled stamps are prohibited in printed and blind books.

(3) in addition to the insured mail, all kinds of letters are prohibited from sending currency, traveler's cheques, secret notes, platinum, gold, silver and their manufactured goods, jewellery, jewels and other valuables.

Prohibition of delivery of articles:

(1) various dangerous articles, such as detonators, gunpowder, firecrackers, gasoline, alcohol, kerosene, tung oil, raw lacquer, matches, pesticides, etc., such as detonator, fire powder, firecracker, firecracker, firecracker, strong acid and alkali and radioactive.

(2) narcotic drugs and psychotropic substances, such as opium, morphine, cocaine (high root), etc.

(3) the state law prohibits the circulation or delivery of goods, such as arms, weapons, domestic or foreign currencies, etc.

(4) perishable items, such as fresh fish and fresh meat.

(5) substances that interfere with public health, such as bones (including incinerated ashes), animal skins not made of nitrate, and animal bones not prepared.

(6) reactionary newspapers and periodicals, publicity materials and obscene or obscene articles.

(7) all kinds of living animals (but bees, leeches, silkworms, and medical and health scientific research institutions are tightly packed and issued parasites that prove to be delivered, as well as insects for the killing of insects, not in this limit).

In addition, the scope of all kinds of mail prohibition and limited mail, in addition to the above provisions, should also refer to the provisions of "People's Republic of China customs regulations on the supervision and control of import and export postal articles and the prohibitions and restrictions on mailing articles by the State decrees, and the postal prohibitions and restrictions of countries (regions) forwarded by the Ministry of post and telecommunications."