Also known as Liu Xin, Ph.D. from Nankai University Business School, Associate Professor university of international business and economics, and tutor of master students. Deputy Director, Institute of Business English, School of English, University of International Business and Economics, Director, Innovation and Entrepreneurship Center. Founder of Beijing Jingzhi Education Technology Co., Ltd., co-founder of Beijing Zhiguo Zhonghui Network Technology Co., Ltd., and former member of the English marking group of Beijing Postgraduate Entrance Examination. He has served as the core lecturer of many counseling institutions and is well-known throughout the country. He is called "Strong Brother" by the examinee.