C57 It was already the sixth day

Chu Feng finally decided to build an outdoor calciner first.

This was because there were some medicinal ingredients that needed to be calcined, especially mineral ones.

In essence, Dog-Bao s were a combination of inorganic salt and organic matter. If Chu Feng wanted to replace the Dog-Bao, he could only think of mineral medicinal ingredients.

For example: Glauber's Salt, Talcum, Bile Alum