Charge. According to the inquiry and supervision, this senior high school teacher group was founded by Beijing Ding Ying Education Technology Co., Ltd. on 20161618. It is a team dedicated to serving high school teachers and students, and carries out for-profit activities. For-profit institutions are not obliged to teach, so they have to charge. The main members of this team are well-known special-grade teachers from key middle schools in various provinces and cities, as well as coaches who have trained many gold medal players in five major disciplines. All members are committed to providing professional, easy-to-understand and practical knowledge for senior high school teachers and students, and helping them solve all kinds of problems in their studies. High school teachers mainly spread knowledge and services through offline and online ways.