When will your trip? Did you buy the Expo ticket yet? I have a bad experience.......
As I want to make a reservation for the pavilion in the Expo, so I bought the tickets online. However I couldn't make the reservation coz the system need "the ticket's number" instead of the ticket's confirmation number. I sent an email to the ticket office for help, and their reply is "I'm sorry, before you get the tickets, you can't know the ticket numbers. If you have an address in Korea, it can be mailed. But, it will take more than 2 weeks." ??!!
I guess Yeosu Expo is not welcome visitors from other countries.