How about sending parcel during the trip? Korea Post Office and Korean Expression

I think Korea's postal service is relatively safe and accurate. I think it is good idea to send a your heavy luggage to your home in advance. Then you can buy more gift for your family or friends.

This is Post Office.

In my case when I went on a trip, my baggage was so heavy that I suffered all my travels. How to send a parcel from the post office is shown on the attached YouTube channel below. And Korean expression, too.
I hope this will help you. :D 

Korea Bookstore Kyobo Bookstore Dongdaemun

There are many shopping centers in Dongdaemun. Do you know there is bookstore in Dongdaemun?
I visited bookstore in Dongdaemun last week. Bookstore's name is Kyobo Bookstore. Kybo Bookstore is Korea's largest chain of booksotres.

In bookstore there is table you can read the book. There is a booth selling Big Bang's and Sechs Kies's album and goods.

There are magazines with photos of stars. There are books about stars and dramas. You can buy gifts and stationery as well as books at Kyobo Bookstore.

You can listen to the required Korean language at the bookstore in the below Youtube channel. And you can see more photos in Youtube channnel.

Shopping in Korea Checking the opening day in Korean

When you are going to shopping in Korea. Please check the schedule of the Mart. In Korea large marts should be closed for a few days a month. For example Emart, gmarket. Usually 2 days a month are closed.

Usually in the mart there is a schedule table. Or you can see the placard like this.
This means this mart will open at this week.

'이번주' means 'this week', '일요일' means 'Sunday', '정상영업' means 'open for business' or 'business as usual'.
I add a video including pronunciation of '이번주 일요일 정상영업' and Questions and Answers about opening days.

McDonald Korea Menu Bulgogi Burger

I think you can eat McDonald Bulgogi Burger only in Korea.

Bulgogi is one of the Korean barbecue.
Bulgogi is a Korean dish that usually consisits of grilled marinated beef.(wikipedia)
But Bulgogi Burger's patty is not beef. Bulgogi Burger's patty is pork patty. And it tastes nothing like real bulgogi.
Bulgogi burger consists of pork patty, bulgogi sauce, mayonnaise, and lettuce.

Bulgogi burgers taste sweet. There is mayonnaise and it tastes good. The patty is soft.
How about trying this? If you want to eat McDonald's menu that you can eat in only Korea.