As soon as I arrived at the airport, I contacted the staff of ChingumMobile to open the SIM card, and I bought a T-money card at the subway station with my friend. It was so convenient for me. We stayed near Dongdaemun, which is not far from Hongdae or Itaewon. We visited Myeong-dong and ate Korean-style bulgogi. We bought chicken again in the early morning and it tasted great.