Recently, LI Fei Research on Positioning Series was published. This series consists of three books written by the executive vice-director of CRRC Prof. LI Fei, Maps of Positioning, Cases of Positioning, and Stories of Positioning. In Maps of Positioning, the author explained the process of the establishment of diamond map positioning and the theory and methods of using models. In Cases of Positioning, the author analyzed the practical marketing activities of enterprises through diamond map positioning and gave the results of the analysis. In Stories of Positioning, the author gave some stories that reflected the theory and methods of diamond map positioning.