Originally Posted by SirJman

ICN is a nice airport, but unfortunately since you'll be flying "foreign" airlines, you will arrive and depart the concourse terminal, which is significantly smaller than the main terminal. Still nice, but not nearly as much to do. And before you think about it, there's no way to get from the concourse to the main terminal since you're already in the secure zone.

Even on 2 tickets, AA should be able to check your bags through to TPE. Both TG and BR have interline agreements with AA.

Although, if you DID have to get your bags, the BR flight is the ONLY option, since you land at 4, you wouldn't make the 4:30pm check-in closing time for the TG flight. Since you are arriving at the concourse terminal, you need to deplane, ride the train to the main terminal to get your bags, wait for them, clear immigration (which can sometimes take a while at ICN, I've waited anywhere from 0-40 min), and make upstairs to check in all in 30 minutes? It's impossible, even if your flight was on time.