What are the necessary things to travel to Korea?

I brought something when I went to Korea. My daughter broke a watch. I insist on showing you:

1. Shopping bag (for shopping)

2. Adapter plug (if there are many electronic devices, the terminal board will provide one)

3. Disposable cosmetics

4. Large suitcase (still shopping)

5. Bread and mustard tuber (many people are not used to eating kimchi)

6. Commonly used drugs (such as berberine)

These are the main daily necessities. Besides, we also signed up for the tour when we went. It's really great. We chose 3+ 1 in Seoul, which means that it will be cheaper for the team to form a+1 day free activity in Seoul than to save a lot of things. And you can shop happily in Seoul for a free day.