To further improve the quality of classroom teaching, promote the exchange of teaching experience among teachers, improve advanced classroom teaching concepts and strengthen their teaching abilities, ICFS organized a teaching observation activity at 13:00 on May 17 in 204 of Tongbo Building. As the main lecturer of this observation activity, Ms. CHENG Xin explained in detail the definition and construction methods of networks, its characteristics, the application of network analysis methods in the field of economics and finance in the class of "Financial Research Practices and Methods" for the doctoral students of ICFS, which presentsher excellent teaching styles to other teachers.