2, such as Niu Dali pig bone soup: slice Niu Dali and add some dry soil. Boil with more than a catty of pig bones, simmer for 2 hours after boiling, and season with salt. Niu Dali is also called pig's foot, golden bell root, upside down golden bell and vigorously sweet potato. Its main components are protein, starch and alkaloids. Millettia speciosa is sweet in smell and mild in nature, which has many benefits to human body.