The same is true of the national level 4 certificate, which is stamped by the Ministry of Education. The color of the certificate may be different every year, but the effect is the same in China. To obtain the national CET-4 certificate, you need to pass the CET-4 exam, which is a national teaching exam sponsored by the Higher Education Department of the Ministry of Education. The main target of the examination is college students, undergraduates or graduate students who have completed CET-4 according to the educational syllabus. The standardized CET-4 and CET-6 have been prepared since 1986.