In this case, the names of the three copper coins can be decided based on the characteristics, material, historical background, personal hobbies, etc. of the copper coins.
1. Name the copper coin according to its characteristics: For example, if the copper coin is engraved with patterns of dragon, phoenix and fish, it can be named "dragon, phoenix and fish coin".
2. Name the copper coin according to its material: for example, if the copper coin is made of different materials such as bronze, brass, iron, etc., it can be named "bronze coin", "brass coin", "iron coin" money" etc.
3. Name the copper coin according to its historical background: For example, if the copper coin was minted in a certain period or dynasty in ancient times, it can be named "Qin Banliang Coin", "Han Five Baht Coin", " "Tang Kaiyuan Qian" and so on.
4. Name according to personal preference: such as "auspicious money", "lucky money", "eight treasure money", etc.