Hulutou(Broth with intestines and tripe), is a local delicacy in Xi’an. Its raw materials are intestine. Before it is served, the customer needs to break the pancake into small pieces, then the chef soaks them in the boiling bone soup three or four times with pork intestine, pork tripe, chicken, sea cucumber and squid on the top. Afterward, lard and greens are added to it. It is often served with preserved garlic and chili jam. It is said that this culinary method was passed down from Sun Simiao, the famous doctor in the Tang Dynasty, to an owner of a restaurant in Chang'an with a bottle gourd of medicine for the flavoring. After the owner of the  restaurant improved the delicacy in light with what Sun Simiao told him, the delicacy became known as broth with Intestines and Tripe for thousands of years.