At home, K-convenience stores battle stagnation; abroad they are powerful K-food ambassador

In the bustling backstreets of Ulaanbaatar, shoppers file out of a CU convenience store with instant tteokbokki, or simmered Korean rice cake, packs and Samyang spicy noodles tucked under their arms.Across the Pacific, South Korean snack aisles at New York's H Mart, a leading cha