한국 만난적이 없는 친척들 선물 사가나요?

감사합니다

My friend is visiting Korea (40 years old).  There are about 70 relatives he never met.

Does he need to buy a gift for those 70 ? (Aunts, Uncles, Their children, and grand children)

He may buy a meal.

Then, does he need to bring gift too?

If so, what gift may be good?

감사합니다