"The system is relatively strong, and various knowledge points can be well connected in series." "The knowledge system is clear, the proportion of words and charts is appropriate, and the key points and difficulties are outstanding." "Not only professional knowledge, but also the application of knowledge points in engineering. At the same time, it also inspires students to think about the orientation of life and future in the teaching process. " What's more commendable is that Zhao Yaqin's lecture "Communication Electronic Circuit" is recognized as one of the most difficult courses in the Institute of Telecommunications, but it is deeply loved by students. From the initial "Fundamentals of Electronic Circuits" to the present "Communication Electronic Circuits", Zhao Yaqin has completed the cycle of all basic courses in the Department of Information Engineering, and some courses have been taught several times. It takes a lot of time and energy to undertake a new round of courses.