In ancient times, it was common to point a bright red mole on a girl's arm like Bai Lianhua to verify women's chastity, which was called "palace sand". People who don't know how to do things think that "guarding the palace" is to keep the beauty of the sacred side. In fact, "guarding the palace" is a kind of scorpion. Its body is slightly flat, its spine is dark, it has millet-shaped protrusions, its abdomen is white and yellow, its mouth is big, its tongue is thick, its four feet have five toes, and its toes are wrinkled. It is a common "gecko". It is good at absorbing other things and can travel on a straight wall. ...
It is said in ancient times that geckos were raised with crocodiles and things like that, and cinnabar was fed every day. When it ate about seven kilograms of cinnabar, it was mashed and used to light a woman's body. It is a little deep red, as long as it doesn't have sex, it will last for life, and once it does, it will disappear without a trace. But it can only be used on unmarried women, and married women are absolutely invalid. This method became popular with the rise of Neo-Confucianism in Song Dynasty. "Palace sand" is artificially added, not born to women. Looking for the so-called "palace sand" among unmarried women can only show their boredom and ignorance. Similarly, whether there is "palace sand" has nothing to do with chastity. If modern people regard traditional myths as treasures, the degree of ignorance can be imagined.