Why do different products have different development methods? For an example that may not be appropriate, a bench, method A is to find a board and connect four boards around it; Another way is to find a piece of wood and hollow it out to make a bench. Although the production methods are different, the bench is the same, and this bench is not novel.
but according to what you said, it seems that you don't know what foreign products are, only know their use effect?