Surat I-O Naengmyeon Nowon Main Branch is a naengmyeon restaurant near Suraksan Station that serves mul naengmyeon and bibim naengmyeon along with donkatsu and mandu. Its representative menu items are mul naengmyeon in icy broth, sweet-and-sour bibim naengmyeon, and a fried mandu set. The main branch has 22 years of history and provides baby chairs and tableware, and there have been cases of a wait of about 10 minutes at lunch. On weekend evenings, the number of customers is high and a wait forms.