"Stamps are the country's business card." This is a famous saying of Bulgarian revolutionary leader Dimitrov. We know that business cards are used to introduce ourselves to others.

Stamps are issued by the state as proof of postage. As mail is delivered to various countries and regions around the world, the postal personnel who handle the mail will know which country the letter comes from as soon as they look at the stamp.

At the same time, stamps also introduce the appearance of one's own country through its pictures, so that others can understand the characteristics of this country through stamps and establish the image of this country.

Therefore, stamp issuing departments in various countries always try to print on small stamps the things that best reflect their own country's characteristics and the events that best reflect their country's achievements.

In the early 1950s, when the imperialists blocked our country, our country's peaceful foreign policy was promoted through stamps and promoted people around the world's understanding of our country. Similarly, we can also learn about various new things happening in other countries related to politics, economy, history, nature, technology, etc. through stamps.

Precisely because stamps can reflect the image of a country from one side, all countries attach great importance to the design, printing and issuance of stamps, making stamps more and more exquisite, thus attracting more and more people. Many stamp collectors.