20% to 30% According to the official information released by Yan 'an University, the re-examination ratio is related to the number of applicants, and the re-examination ratio of graduate students in Yan 'an University is 20% to 30%. Yan 'an University, referred to as "Yan 'an University", is located in Yan 'an City, Shaanxi Province, the holy land of revolution. It is the first comprehensive university founded by China * * * Production Party, which was jointly established by China People, Ministry of Education and Shaanxi Provincial People's Government.