Invention refers to a new technical solution proposed for a product, method or improvement thereof.
Utility model refers to a new technical solution proposed for the shape, structure or combination of a product that is suitable for practical use.
Creativity means that compared with the existing technology, the invention has outstanding substantive features and significant progress, and the utility model has substantive features and progress.
Those in the mechanical field can apply for either inventions or utility models, or both can be submitted on the same day. Generally, if the creativity is large, you apply for invention, and if the creativity is small, you apply for utility model.
In the field of chemistry, such as composition formulas, etc., you can only apply for inventions.