Where is the elephant invisible calligraphy suitable for hanging?

Ah, elephants are invisible. Where is calligraphy suitable for hanging? This kind of calligraphy is usually suitable for hanging in the study, because it is a central idea of Taoism, which is what you pay attention to. Inaction, ah, do you notice this inaction? No photo is invisible, so this one is suitable for hanging in the study this time.