1, because there is a certain amount of oxalic acid in Bitter Chrysanthemum, if oxalic acid is ingested in the body, it will affect the normal absorption of calcium by the body, and it will also form calcium oxalate, which is very harmful to health, so it is necessary to remove oxalic acid and blanch the pattern.

2. Soak the bitter chrysanthemum in clear water for a while, then put half a pot of water in the pot to boil the water, and then put the washed bitter chrysanthemum in the pot to blanch. This process is called running water, but the blanching time should not be too long. If it takes too long, it may boil the bitter chrysanthemum.