This paper explores two contrasting modes of transmission of divinatory knowledge in contemporary Taiwan and mainland China. One is built on the academic model which emphasizes written communication and the other one on the teacher to student relationship which favors oral transmission. In Taiwan, faced with the declining quality of teaching and the multiplication of schools of thought, divinatory arts specialists tried to reform their knowledge and teaching methods to make them fit with the scientific requirements of contemporary society. This endeavor which had already been launched in mainland China in the Republican era, resulted in Taiwan in a boom of popular handbooks and a standardization of training. Then, I qualify this evolution through a case study conducted in mainland China which, on the contrary, highlights the importance of personal relationship and orality in the transfer of mantic techniques. In this context, methods and know-how are taught through predestined affinities, initiatory journeys and legends. [ABSTRACT FROM AUTHOR]