General upgrades will include:

First, director level, manager level, director level, etc. These are internal promotion methods;

Second, such as cake shops and gourmet shops. , generally have a professional certificate or training certificate; You can get it in some regular schools or some training schools.

Third, like sales titles, such as wine titles or real estate titles, different industries will have different certificates, which can be directly searched online.

Every industry and every field will have different titles and rules. If you look according to the industry field, you can look more professionally.