On November 22, 2022, Prof. Wu Qihui, Vice President of Nanjing University of Aeronautics and Astronautics, was invited by Prof. Gao Yue to visit the INC Laboratory of School of Computer Science, Fudan University. This exchange took the form of a report. The INC lab students showed the experimental data of spectrum compressed sensing to Professor Wu, and Professor Gao Yue explained the relevant work being carried out in the lab. Afterwards, Professor Wu gave a keynote speech entitled Basic Theory and Method of Electromagnetic Channel Situation Cognition to the students. He analyzed the current complicated status of spectrum security situation and the international frontier research in this field, which deeply inspired the students and triggered heated discussion. After the meeting, Professor Gao Yue expressed the hope that the two sides will continue to deepen exchanges and cooperation, deepen the common research purposes, and look forward to producing more fruitful results in the future.