Cinnabar can't be written if it is sealed with water without hanging a pen (at least the written words are very light).
Generally, the roots of Chinese herbal medicine "Bletilla striata" are dried, ground into powder, combined with cinnabar, dipped in high-alcohol liquor and written with a brush. This method is generally used for feng shui conditioning, and this kind of brush for writing cinnabar characters needs the blessing of professionals.
Cinnabar is bright red, which the ancients thought could ward off evil spirits and was often scattered in tombs; Or stuffed in a box for storing jade articles; Sometimes jade articles are wrapped with silk dyed with cinnabar, which makes cinnabar the most obvious attachment on unearthed jade articles.