Prof. Nianxiang Sun from Northeastern University, USA. May 10, 2019.

Prof. Qiming Zhang from Penn State University, USA. July 21, 2018.

Dr. Xinming Wan from Hai'er, June 25, 2018.

Prof. Jiawang Hong from Bejing Institute of Technology, China. June 4, 2018.

Prof. Junyi Zhai from Beijing Nanoenergy and Nanosystems, Chinese Academy of Sciences, China. April 27, 2018.

Prof. Zhiguang Wang from Xi'an Jiaotong University, China. April 27, 2018.

Prof. Manrong Li from Sun Yat-sen University, China. March 29, 2018.

Prof. Shuai Dong from South Easten University, China. March 29, 2018.

Prof. Karaki TOmoaki from Toyama Prefectural University, Japan. Marchr 13, 2018.

Prof. Junling Wang from Nanyang Technological University, Singapore. Octomber 18, 2017.

Prof. Shengqian Ren from Temple University, USA. June 5, 2017.

Prof. Tom Wu from King Abdullah University of Science and Technology. May 19, 2017.