No.

According to the official notice of the CET-4 and CET-6 exams, you need to download the official exam commitment letter and sign it before the exam, so handwriting it by yourself is not allowed.

CET-4 or CET-6 generally refers to CET-4 or CET-6. CET-4 and CET-6 is a national English test administered by the Ministry of Education. Its purpose is to objectively and accurately measure the actual English proficiency of college students and provide evaluation services for college English teaching.