In addition to the use of paper, bookmarks can also be made of high-quality pure copper and zinc alloy materials. There are nickel-plated baking varnish, sand nickel-plated, antique copper, pad printing, gold-plated baking varnish, two-color electroplating, nickel-plated enamel, nickel-plated inlay and other exquisite craftsmanship. Become. This is called a metal bookmark, which is an innovation in the development of bookmarks. During the temple fair, you can see a lot of metal bookmarks on Facebook, which represent traditional Chinese culture.