At the invitation of Prof. Kun Wu, Head of the International Center for the Philosophy of Information at the Xi’An Jiaotong University, Prof. Pedro C. Marijuan paid a ten-day academic visit to the University November 4 -14, 2016. During his visit, Prof. Marijuan presented three lectures to students and teachers and had two dialogues with Prof. Wu November 11^th and 12^th on the topic of “The Nature and Unification of Information Science and Information Philosophy”. Under this main topic, several sub-topics were discussed, such as the origin and development of information science and technology, the concept of entity, the fundamental principles for building a unified information science, relevant bio-information studies, the epistemological media of information philosophy, the relationship between information flows and matter-energy flows, the statuses of computationalism and general information theory, the structure of unified information science and so on. This extended abstract succinctly displays some basic content of those dialogues.