You can understand it this way, that is, you come in boxes by yourself, and then you give them to the guests, which is called bulk food;

Prepackaged foods: The products are sold in packages, such as100g or 200g.

You can't put a box of melon seeds in, repackage and label yourself. This can only be done in WeChat business, because repackaging and labeling involve production licenses. It used to be called qs, but now it's called sc.