(1) Soak Nostoc flagelliforme, wipe it clean with a few drops of raw oil and wash it.

(2) Wash oyster sauce (soak in water), wash pork and cut into pieces, and wash plum beans.

(3) Put the oyster sauce, pig gizzards and plum beans into a pot, add a proper amount of water, boil with strong fire, slow fire 1 hour, add Nostoc flagelliforme, and slow fire 1 hour for seasoning.