1, Beiqi is washed, cut into pieces, boiled in boiling water for a while, taken out and rinsed with clear water, and drained for later use;

2. Wash yam, peel it and cut it into small pieces.

3. Wash Lycium barbarum with clear water, drain water, and set aside;

4. Put a proper amount of clear water into the soup pot. After the water boils, put all the ingredients in, boil over high fire, turn to low fire, cook for another two hours, and season with salt.