This means. It is a major category of industrial design. . Product modeling direction. .
Broadly speaking. . All mass production products. . All belong to the category of industrial design. . If what you want to do is art. Then you should study industrial design (cultural product direction).
If you want to learn, like Chow Tai Fook. Wait, the designs of the ring necklaces displayed in those jewelry stores. . Then you have to study industrial design (product modeling direction), because you will design some molds, which are mass-produced products.