You can have a certificate when you have no job, but you must have a certificate after you have a job. The former certificate is to help you find a job, and the latter certificate is to help you by going up one flight of stairs in your career development, which is completely different in nature.
3. College students don't know what industries and occupations there are in society. The first two things to do after entering the society are: to get rid of the spirit of students and become professionals; Form a social vision. Both of these things are to help you choose a job.