2, next use a knife to cut the magnolia bark into smaller pieces.
3, then put the pieces of magnolia bark into a mortar and pestle, grinding back and forth inside the mortar and pestle until the pieces of magnolia bark are completely ground into powder.
4, Finally, the ground magnolia bark powder will be filtered through a fine sieve or gauze to remove the large particles or impurities and obtain a more delicate magnolia bark powder.