How to check which items cannot be delivered?

The prohibited items of international express delivery  as follows:

1. Explosive, flammable, corrosive, toxic, strong acid-base and radioactive dangerous items, such as detonators, gunpowder, firecrackers, gasoline, alcohol, tung oil, raw lacquer, matches, pesticides, etc.;

2. Narcotics and psychotropic drugs, such as opium, morphine, cocaine (kogan), etc.;

3. Items prohibited from circulation or delivery by national laws, such as arms, weapons, domestic or foreign currencies, etc.