What does nature's stamp mean?

Here, the maple leaf is compared to a stamp, similar to a stamp in the real world. The materials and shapes of stamps issued in the world are diverse, and the stamp patterns are rich and colorful. Why are small stamps often called "national business cards"?

That's because stamps are usually printed with the memory of the country or issuing agency to which the postal service belongs, with signs of face value or equivalent postal charges, and related theme patterns or words.

Extended data:

Stamp patterns are generally composed of patterns related to the purpose of issuing stamps, country name, face value, explanatory text and decoration. The early stamp patterns of all countries in the world are relatively simple.

With the development of society, countries all over the world use their most representative contents in politics, economy, national defense, science and technology, culture and art, historical geography, natural scenery, precious animals and plants as stamp patterns.