Coins are currency minted from metal. It has a history of thousands of years in China. The earliest metal coinage was the Baode copper shell of the Shang Dynasty, more than 3000 years ago. Metal coins have the advantages of convenient use, abrasion resistance, and long circulation life. In addition to its own currency functions, it also has high artistic appreciation and collection and preservation functions. So what is the specific information about the coins used for commemorative significance?