These standards require that at least the goods in each sales unit should be labeled. In other words, for example, selling a big bag of soybean milk powder is a sales unit, and the big bag is labeled. It's okay to open a lot of small bags, which are not sales units, so there is no identification label on them.
In another case, the outer packaging is the kind of corrugated box for transportation, and there is no identification label on it. The logo label is on the real goods inside, and this is no problem.
Finally, the packaging of a sales unit contains different kinds of food that can be sold separately in multiple independent packages, and the food label of each independent package should be marked separately.