According to the inquiry of Schwab Training Network, the ab certificate of English was obtained through the practical English test in colleges and universities, and it is commonly used in China. Class ab is the national examination. English AB level test is universal in China, and there is no independent proposition in any province or city. The only difference is that level B is less difficult than level A.. The National College Practical English Test (PRETCO), referred to as English Proficiency Test, is divided into two levels: AB. Grade B is the minimum standard requirement for students in higher vocational colleges, and the standard of Grade B is slightly lower than that of Grade A, which is a transitional requirement. The ability requirement of AB level is equivalent to CET-3 level, and the examination is generally conducted in June of the first half of each year and June 65438+February of the second half of each year (the second day of CET-4 and CET-6).