Korean anchor sells skin care products. Is Korean direct mail the same as her domestic delivery?

Korean anchor sells skin care products. South Korea's direct mail is different from her domestic delivery.

South Korea sends it directly, not through domestic transit. It means that after placing an order in Korea, it will be sent directly to the consumer's address in Korea. A kind of international direct mail is mainly in the form of universal postal service. In order to send overseas and domestic postal services, goods need to go through the customs of the two countries to complete the mode of postal docking between the two countries. However, this mode is currently inefficient, and the efficiency of international private direct mail is low.