According to the relevant policies of China's vocational education, students in vocational high schools generally need to make up exams or make up classes if they fail the courses. The specific plan will be determined according to the regulations of the school. If students can pass the make-up exam or make-up exam and reach the qualified score required by the school, then they can get the diploma.

However, it should be noted that the policies of different schools may be different and need to be confirmed by referring to the relevant regulations of the school. In addition, some schools may stipulate that the number of failed subjects cannot exceed a certain number, otherwise the graduation qualification may be affected. Therefore, if you are a vocational high school student, I suggest you consult the relevant person in charge or teacher of the school to understand the specific regulations and remedial measures of the school.