Why is Huizexian called the "Hometown of the King of Money"?

Historically, Huize was known as the "Tiannan Copper City" and was famous for the development, smelting and transportation of copper resources. The well-preserved "Jiaqing Tongbao" commemorative coin of the Ming Dynasty is the largest and heaviest ancient metal coin in the world. It has been recorded in the Guinness Book of World Records. Therefore, Huize has also gained the reputation of "the hometown of money kings".