If a company does not recruit relevant personnel, can it apply? Do you go directly to the company or call first?

Never dial the recruitment information posted on the fixed line. Generally, it is not the leader who answers the phone. Although you want to practice, the other party will think it is a competitor. You know how difficult it is to find a job without a position now. If you want to apply for a position that is not openly advertised, you'd better go to a large enterprise. Generally, small units will not accept your request. They have no money. They can try to check the recruitment information released by a unit through their mobile phone numbers. Usually the number of the leader. Although you don't want to recruit this position, you can call and ask.