There are at least two cases in which the original mirror is used as a copy model. One is that the original mirror is completely imitated and engraved on the model according to the original mirror pattern pictures and inscriptions. Although the patterns of the bronze mirrors are different, the inscriptions and patterns are quite different. The second is that although the original mirror is used as a copy, the mirror maker also engraves patterns and inscriptions. Some of the patterns of the mirror are not in accordance with the age of the inscriptions. For example, the Han mirror is clearly combined with the common inscriptions in the Ming mirror; some of the shapes and patterns are not the same.

There is also a kind of splicing method of broken mirror: that is, to stick and mend the copper mirror. When the copper mirror is unearthed, there are few intact ones, most of them are broken or incomplete. The counterfeiter will weld the broken pieces into a whole, and then use another copper rust to mend the incomplete parts. Where the mirror surface is not smooth and there is green rust, they are all added.