The full name of CET4 is CET4. This is because this kind of test is a national English proficiency test sponsored by the Ministry of Education of China, aiming at evaluating the English ability of college students. This test is divided into four levels, of which the fourth level is the lowest, which mainly tests the candidates' basic English abilities, including listening, reading, writing and translation.
This kind of examination is aimed at college students, so the full name includes the expression of "National College English Test" to clarify the object and scope of the examination. CET-4 certificate is also one of the basic requirements of many enterprises and institutions for English ability, which has high authority and recognition.