1. Wash yam, peel it, soak it in water, and cut it into hob blocks for later use.

2. Put half a pot of water, put in the washed bone, boil it over high fire for 5 minutes, turn off the fire, remove the bone and wash it.

3. Put a proper amount of water into the casserole and boil it (once enough, don't add water in the middle), add bone and ginger, drop a few drops of white vinegar, and simmer for an hour after the fire is boiled.

4. Add yam and carrot, simmer 1 hour, and season with salt.

Yam, also known as Dioscorea opposita, Dioscorea opposita, Dioscorea opposita, Dioscorea opposita and Dioscorea opposita, is a kind of herbal medicine recorded in Chinese Materia Medica, and its medicine source is the dried rhizome of Dioscorea opposita.

Yam has the effects of nourishing and strengthening, helping digestion, astringing deficient sweating and stopping diarrhea, and is mainly used to treat chronic enteritis such as diarrhea due to spleen deficiency, cough due to lung deficiency, diabetes, short and red urine, nocturnal emission, female leukorrhagia and dyspepsia.

Yam can't be eaten with kansui.

Yam tonifies the kidney, strengthens the spleen and moistens the lungs. Can stimulate the intestine, increase intestinal peristalsis, and produce laxative effect. These two effects are diametrically opposed and should not be confused.

Yam can't be taken with alkaline drugs.

Yam contains amylase. Yam is taken together with alkaline drugs, which will make amylase in yam ineffective and reduce its nutritional value.

Yam and pork liver can't be eaten together.

Yam is rich in vitamin C, and pig liver contains trace elements such as copper, iron and zinc. When vitamin C meets metal ions, it will accelerate oxidative damage and reduce its nutritional value. Therefore, it is not suitable to eat yam after eating pig liver.

Yam and cucumber can't be eaten together.

Cucumber contains vitamin C decomposing enzyme. If you eat it with yam, the vitamin C in yam will be decomposed and destroyed.

Yam and pumpkin can't be eaten together.

Pumpkin contains vitamin C-decomposing enzymes. If eaten with yam, vitamin C will be broken down and destroyed, thus reducing the nutritional value of yam.

Yam and carrot can't be eaten together.

Yam is rich in vitamin C, while carrot contains enzymes that decompose vitamin C. If eaten at the same time, vitamin C will be broken down and destroyed.

Yam and pumpkin can't be eaten together.

Pumpkin contains enzymes that decompose vitamin C, and yam is rich in vitamin C. If pumpkin and yam are eaten together, the vitamin C in yam will be decomposed and destroyed, resulting in a decrease in the nutritional value of yam.