Our first stop was the busy street of Huimin, where I got a taste of Rou Jia Mo. According to Wikipedia, some details:
Rou jia mo, means "meat burger or meat sandwich," is a street food originated from Shaanxi Province of China and is now widely consumed all over China. The meat can be pork, stewed for hours in a soup consisting of over 20 kinds of spices and seasonings. Although it is possible to use only a few spices (which many vendors do), the resulting meat is less flavourful. In Muslim areas in Xi'an, the meat is usually beef (prepared Kabob style and seasoned with cumin and pepper), and in Gansu it is often lamb.