Which department should institutions consult for professional titles?

Ministry of labor and personnel.

Professional title evaluation is a post management system implemented by state-owned units. The evaluation is confirmed by the personnel department of the unit, so the evaluation conditions and specific implementation are managed by the personnel department of the unit. Strictly speaking, the titles of non-state-owned employees are not titles, but qualifications and qualification certificates.

What title do you need? You can find the registration information of various titles directly by logging in to the website of the local people's social security bureau.