Professor Leyong Wang visited Henan University on December 13-15, 2017 for academic exchanges and participated in the 'Second Optoelectronic Functional Materials Academic Salon hosted by the Nanomaterials Engineering Research Center of Henan University. During the conference leisure time, visit Kaifeng Qingming Riverside Landscape Garden. Experience the elegant taste of the old campus of Henan University with the characteristics of the Central Plains culture, and re-understand our modern culture. Thanks to Professor Wang Hua and colleagues from the Nanomaterials Engineering Research Center of Henan University for their meticulous organization and warm reception.