How to get the subway.

Seoul always has traffic jams so seoul citizens use the subways for a useful and efficient means of travel. First, find the near subway station. Enter the station. There are 2 options. If you already have traffic card you just can pass the entrance. But if you don't have, you should buy traffic card which can use once at the vending machine. At this time, there are guarantee-money, 500won. This money will be back when you arrive your destination. Later you have your card and put the card at the entrance. Next find the direction where you want to go. There will be the sign which guide your direction. Follow the notice and there will be the subway. You get in and just wait until reaching at your arrival. If you have to change the line, you should get off the subway and follow another direction. There will be the melody at transfer station, you tell the line and get a transfer. Last, finally arrived at your journal's end. You should find the exit from the notice and put your card again to leave the station. In this case, you have your one-use card, there are a guarantee-money machine. Put the card and get back your 500won. And just find your exit number and follow the sign.