于丹 Traditional form: 于丹 Pinyin (reading): Yú Dān Definitions: Yu Dan (1965–), Chinese scholar and author known for popularizing Chinese classical thought Characters: 于 - at, in, on; to, from; alas! 丹 - cinnabar, red, vermilion; pellet, powder Traditional characters: 于 - at, in, on; to, from; alas! 丹 - cinnabar, red, vermilion; pellet, powder