Practice: (1) raise loach with clear water1~ 2 days later to remove mud, gills and internal organs, remove mucus with a little salt, then drag it with boiling water, drain the oil, take out the pot, add ginger and saute until fragrant, and shovel it for later use.
(2) Wash Radix Astragali, Radix Codonopsis, Fructus Jujubae (denucleated) and Rhizoma Dioscoreae, put them in a sand pot with loach, add appropriate amount of water, and simmer for 2 hours to taste.