Gaya Haejang Yongsan Branch is a Korean restaurant in Yongsan, Seoul, serving haejang-guk and hanwoo gopchang jeongol. The hanwoo gopchang jeongol contains plenty of gopchang and beef bones, and its broth is rich and mildly spicy. Right after the break time ends at 5 p.m., you can enter without a wait. Ordering udon-sari brings noodles instead of udon.