korean culture

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There is so many rules when you treat the olders in korea.
Foreigner who travelling korea first time is surprised to that
Even though i am korean, i don't know all about that.
Here is some examples of that rules.
When you greet to several peoples, you should say hello to the oldest people in that group.
That's not difficult.
When you go out or come back to home, you should report that to parents or other the olders.
It's because if parents don't know where you are parents will worry about you.
It's impolite to let parents are worried about you.

By the way, do you know?
The soldier who use the umbrella in base is considered very rude.
I don't know why but it is.