Changwang noodles

Chang-wang noodles is a popular snack in Guiyang City, Guizhou Province, China. It is a type of noodle soup made with intestines and blood as additional ingredients. The locals refer to pig blood as "Wang" hence the name "Chang Wang Noodles". These noodles are believed to have originated in Yunyan District during the Tongzhi period of the Qing Dynasty. Su Desheng, a native of Guiyang during the Republic of China period, is credited with further refining the dish.

Source: Wikipedia