From Cheongsapo, Songjeong is just A further 2 km (one.two mile). After you reach Songjeong you'll be able to both go ahead and take metro from Songjeong station back to Haeundae. If you decide to walk back you may include Moontan Road, a peaceful forest path which I mention in https://alfredf196xfn3.life3dblog.com/33167209/the-haeundae-ocean-diaries