Qi Hang Postgraduate Entrance Examination was established in 1998, aiming to become an educational service institution for college students. After 20 years of development, it has grown into a well-known brand of postgraduate counseling, which has certain authority in postgraduate politics, postgraduate English, postgraduate mathematics and other disciplines. In addition, Qi Hang Postgraduate Entrance Examination has directly affiliated branches in Beijing, Tianjin, Shenyang and other cities, and has more than 200 affiliated branches in major cities across the country.
Zhang Yu, a math teacher who set sail for postgraduate entrance examination, has been engaged in advanced mathematics teaching and postgraduate counseling for many years, and has published many papers in national core journals, one of which was selected for the 2007 global sustainable development conference. Zhang Yu's courses are divided into basic articles and intensive reading articles.