New Oriental is well-known, mainly providing services related to studying abroad. Aiqihang and Du Wen are both counseling institutions that focus on postgraduate training. Both of them have more than 20 years of teaching experience, and the teaching mode ranges from online classroom to face-to-face teaching to supporting books. If I really want to choose one, I will choose Aiqihang, because Aiqihang not only has a famous team of postgraduate teachers, such as Zhang Yu, Wang Ji, Ma Tianyi,, Peng ... but also has a professional management team and service system, focusing on the research and exploration in the field of postgraduate training, establishing an education system with feedback, automatic diagnosis and sustainable iteration, and providing personalized education for students.