On December 19, 2025, our college invited Associate Professor Liu Kaihao from the School of Economics of Shandong University to visit the "Nankai CESD Young Scholars Salon" and gave an academic lecture entitled "Urban Network Embedding, Knowledge Boundaries and Export Product Scope—From the Perspective of Flow Space". The lecture was presided over by Professor Zhou Mi of our college, and Professor Zhang Gui, Professor Wang Jiating, and Assistant Researcher Guo Jiahong were the interactive guests.

Starting with a review of the concept of urban networks, Associate Professor Liu Kaihao pointed out that to understand the driving force of enterprises' export product innovation, it is urgent to break through the static agglomeration perspective limited to geographical proximity, and we should pay attention to the explanatory power of the dynamic externalities of "flow space" in the form of urban network embedding on enterprises' export industrial innovation. In the future, we should focus on the construction of a broader urban cooperation system, unblock the influence channels of urban network embedding on promoting enterprises' export scope, and pay attention to the introduction and cultivation of innovative brokerage enterprises.

In the exchange session, Associate Professor Liu Kaihao had a heated discussion with the participating teachers and students. Professor Zhang Gui, Professor Wang Jiating, and Assistant Researcher Guo Jiahong made wonderful comments on the report combined with their respective research fields, first affirming the rigorous writing logic and profound theoretical thinking of the paper, and then discussing the data, mechanism, and other aspects of the paper. Associate Professor Liu Kaihao also gave detailed responses to the questions and suggestions from other teachers and students on site. Through this lecture, the students have a further understanding of the construction of urban and regional network models, empirical design, and mechanism considerations.