Hyodonggak is a Chinese restaurant selling jjajangmyeon near Sinchon Station and Yonsei University in Seoul. Its old-style jjajangmyeon is light, with large chunks of zucchini, onion, king oyster mushroom, potato, and sweet potato and no meat. It is open only from 11:50 a.m. to 3 p.m., and orders are placed at a kiosk at the entrance, after which customers carry their own food and side dishes and return their trays. The regular jjajangmyeon portion is small.