The root of Flammulina velutipes can be regenerated. The cut root does not need to be thrown away. It only needs a few steps to make the root grow again. Prepare a small bottle or plastic bag, put a piece of paper towel in it, wet the paper towel with soda water, put the cut root on the paper towel, put it in a place where the dark sun can't shine at all, and then it will grow new in a few days
The fresh Flammulina velutipes bought after cutting the root, regenerate the root according to the above method, cut off the part of the root and soak it in the diluted salt water for a few minutes, take it out and drain it slowly so that it doesn't drop any more water. Then it can be stored in the refrigerator's freezer. According to this method, it can be kept for about a week, but in order to ensure a better taste, it's better to eat early.
