Private model suggests that product registration copyright or product registration appearance patent protect rights and interests.
The male mold is public, that is, after the mold is opened by the manufacturer (of course, this mold belongs to the mold-opening manufacturer), anyone can buy the products produced by this mold, so it is called the male mold. Private model is where I open the model. Except me, the products produced by this mold can only be sold to me, and no one else can sell them at any price. Moreover, I paid for this mold, and the ownership only belongs to me, and the manufacturer only keeps it.