Can pupils use divination copper coins?

Pupils can't use Guagua copper coins. Children with weak fire can put cinnabar on their foreheads, or take out the unfinished millet in the cock's neck and dry it to make sachets. Both are the best things in the world to ward off evil spirits and eliminate disasters. According to legend, the divination of copper coins was created by Guiguzi during the Warring States Period, and the method of asking for fifty rods of yarrow was replaced by three copper coins.