How do we travel from busan ktx to hundae subway
You will arrive at the KTX Station in Busan. You then leave the KTX Station to get to the Metro. It's signposted in English and is a minute's walk past the Plaza and fountain to the Metro Entrance/Exit. This Metro Station is called "Busan Station" and is on Line 1 (Orange Line) You take the Metro for 6 stations until you reach Seomyeon Station. Transfer here to Line 2 (Green Line) and travel 16 more Stations to reach Haeundae Station. The journey usually takes me 55-60 minutes . Announcements are made in English.
There is a map on www.humetro.busan.kr. I use my Busan Humetro Card (aka Hanaro Card) and there is a recharge machine in Busan Station. I think, but am not sure, that T Money Cards from Seoul can be used in the Busan Metro, but may not be able to be recharged on the Busan Recharge machines.