In Seoul, subway networks, linking most of the destinations in the central area of Seoul should go back to the very convenient, cheap, the equivalent of the bus, which transfer many times also. However, there were some difficult points that are a few Korean announcement only ships and electronic ticket system. To buy the tickets you need to use the payment automatically, put paper money and coins into the air. Air supports English and 2 options, one is chosen according to the station name or only the destination on the map then pay.
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