North Korea's most famous restaurant, Okryu-gwan, located in Pyongyang, is known for its ''raengmyeon'' cold noodles. Other dishes served there include gray mullet soup with boiled rice, beef rib soup, green bean pancake, ''sinsollo'' and dishes made from terrapin. Okryu-gwan sends research teams into the countryside to collect data on Korean cuisine and introduce new recipes. Some Asian cities host branches of the Pyongyang restaurant chain where waitresses perform music and dance.