Wash the whole mugwort grass (leaves, stems, roots), drain it, cut it to a suitable size, and stuff it tightly in a glass jar.
Pour alcohol into one until it is flat. (Note that if mugwort comes out of ethanol here, it will cause mold.)
When the extract of the material is removed (about one week), and the color begins to dissolve in the liquid, the whole wormwood is taken out and completed.