Traditional Sichuan dish. Nanluo Fat Cat Grilled Fish is a grilled fish restaurant located in Nanluoguxiang, Dongcheng District, Beijing, famous for its specialty of grilled fish in sour soup. Grilled fish in sour soup is a traditional Sichuan dish made with freshwater fish such as crucian carp or grass carp. While the fish is grilled with a variety of seasonings and vegetables, the sour soup is made with ingredients such as sauerkraut and pickled peppers, and has a hot and sour appetizing taste that is perfect for serving with grilled fish.