Euro A 1 is equivalent to IELTS 1- 1.5, A2 is equivalent to IELTS 2-3, B 1 is equivalent to IELTS 3.5-4.5, B2 is equivalent to IELTS 5-6.5, and C 1 is equivalent to IELTS 7-7.5. \r\n European Common Language Reference Framework (CEFR). This set of standards carefully provides a benchmark for the evaluation framework, teaching guides, exams and textbooks of European languages. European * * * same language reference standards are divided into C2, C 1, B2, B 1. A2.A 1 * * 6 standard. \r\n IELTS, mbth International English Language Testing System, jointly managed by Foreign Language Testing Department of Cambridge University Examinations Committee, British Council and IDP Education Group, is an English proficiency test for those who intend to study, work or settle in English-speaking countries. \ r \ nIELTS is divided into two categories: academic and training, which are aimed at students who apply for studying abroad and those who intend to work or immigrate in English-speaking countries. The exam is divided into four parts: listening, speaking, reading and writing, with a total score of 9 points.