Why don't those big enterprises in Shanghai hand over all the tasks of recruiting general workers to the intermediary, but recruit directly? How to contact their human resources department directly?

This is normal. When the company needs ordinary employees, handing over the recruitment work to a more professional intermediary can save the recruitment cost of the human resources department and improve the recruitment efficiency. There are generally three ways for large companies to recruit different candidates: 1, and give full authorization to some temporary personnel; 2. For most ordinary employees, there is an intermediary to conduct the primary election, and then the company's personnel department will re-examine; 3. The application for a special post may be completely carried out by the company itself, with the personnel department conducting the preliminary examination first and then the supervisors at all levels conducting the re-examination.

If you want to contact them, first find their company's phone number online, call the front desk and transfer it to the human resources department.