1, take a ganoderma lucidum, cut it into pieces, put it in a pot, add hot water, then buy some rushes, add garlic and cook for 5 minutes.

2. Observe the color of rushes. If Juncus Juncus turns green or purple-green, it means that this Ganoderma lucidum is poisonous. If the rushes turn yellow, it means that this ganoderma lucidum is not poisonous. At the same time, garlic turns black, but garlic does not turn black. Ganoderma lucidum is not poisonous.