What Ti and Yong Mean in Mei Hua Yi Shu: Telling the Ti Trigram from the Yong Trigram
Ti and Yong are the core coordinates of Mei Hua Yi Shu: the Ti trigram stands for the side of the person asking and the Yong trigram for the side of the matter being asked about. The method reasons mainly from the inner and outer trigrams, the Ti and Yong trigrams, the nuclear and changed trigrams and the line texts, and once Ti and Yong are mixed up, none of the layers after them can be read.