Traditional design idea of copper coins

From the use point of view, it is easy to carry, and the outer ring can reduce friction; It is convenient to thread the rope into the inside to make it string, which reduces the weight and is convenient to carry. Furthermore, the ancient concept that the sky is round and the earth is round symbolizes that money can be used universally between heaven and earth. According to the numerology concept of the ancients, the circle belongs to gold, the side belongs to soil, and the soil and gold coexist, which helps to protect money (gold) and make its circulation not bad! From the aesthetic point of view, the outer circle corresponds to the inner side, which is harmonious and beautiful. Round, dynamic, static and appropriate. It's amazing!