What is "haejangguk"

Haejangguk refers to all kinds of guk or soup eaten as a hangover cure in Korean cuisine. It means "soup to chase a hangover" and is also called sulguk . It usually consists of dried Napa cabbage, vegetables and meat in a hearty beef broth. One type of haejangguk, Seonjiguk, includes sliced congealed ox blood (similar to black pudding) and another type, Sundaeguk includes a kind of blood sausage made with intestine stuffed with pig's blood and other ingredients.