At the invitation of the School of Resources and Environment Engineering, ECUST, Associate Professor Xu Lichong of the Pennsylvania State University(PSU) paid a visit to ECUST on December 12th, 2019, starting a four-day short-term teaching and academic exchange. Professor Xu taught the course “Materials Surface Research Methods in the Environment” to the class 2019 graduate students and the international students majoring in environmental science and engineering. And Professor Xu also participated in academic exchange activities such as the Shanghai Postgraduate Academic Forum on “Modern Energy Technology” and the Seminar in Water Supply and Water Treatment Research Office which were hosted by the School of Resources and Environment Engineering.