Chapter 816 The Dan has been completed.

When the employees of the medicinal material base all ate well and left, Li Yong told Tiger to close the windows, then pull up all the curtains, and lock the door of the room, and then guard outside the door, not to let anyone come in.

Next, Li Yong started the preparation work before alchemy. After thinking about it, he took out all the herbs at once and put them in the sink to clean them one by one, because there was dust and pesticide residue on them, so they must be washed.

There was very little dust and no pesticides in ancient times, and back then it was all natural herbs that could be used to make pills directly.

Nowadays, the air is heavily polluted, and all sorts of pesticides are sprinkled in order to prevent insects and high yields. This invariably affects the quality of the herbs, and if you don't get it clean, the elixir that you refine might not have much effect.

After all the herbs were carefully and conscientiously cleaned, Li Yong then divide