1. Rehabilitation hygienists need to obtain the vocational training certificate of ETTIC rehabilitation hygienists, which is the only and authoritative certificate in China, and it is the basis for workers to take up their posts and be promoted. Excessive promotion of professional qualifications in this profession can be used as a valid certificate for directly applying for the national vocational qualification certificate (this certificate can be used equally without replacement). The service life of CETTIC certificate is life-long, and there is no limit to the service life, so there is no need for annual review.
I'm not from Qingdao. I'm not sure about that. I'm sorry
3. This is issued by "National Ministry of Human Resources and Social Security" without any restrictions.