The implication of the inner side of the outer circle of ancient coins

The implication of the inner side of the outer circle of ancient coins;

1, the ancient world view, there is a saying that the sky is round and the place is round;

2. Qin Shihuang worshipped the land Lord and used square hole money;

3. The city round well represents the excircle of money, representing cities and countries, and the mainland can represent water wells and commercial trade;

4. In ancient times, there was a saying that all directions;

5, in addition, the square hole money, the inner side of the outer circle is conducive to processing and polishing.