Teacher Hai Nayan is a graduate student. Hainachuan Training Senior Lecturer, Dean of Shanghai Hainachuan Speech Research Institute, copyright owner of export-oriented eloquence course, judge of trainer's competency certificate of Ministry of Human Resources and Social Security and China Vocational Association, authorized tutor of TTT international professional trainer's standard course, chief tutor of business speech psychology, international and national senior registered professional trainer, executive director of China Speech and Eloquence Association, special consultant of Speech and Eloquence magazine, and special judge teacher of Fudan University, Huazheng Law and Donghua University.