根据《中国药典·2020版·四部·0213炮制通则》：取待炮制品，置容器内，加适量水共研成糊状，再加水，搅拌，倾出混悬液。残渣再按上法反复操作数次，合并混悬液，静置，分取沉淀，干燥，研散。
Take the prepared product, place it in a container, add an appropriate amount of water and grind it into a paste, then add more water, stir, and pour out the mixed suspension. Repeat the above process several times with the residue, combine the suspensions, let it settle, take the precipitate, dry, and grind it.