Chinese fir wood is easy to crack and its quality is poor. It is recommended to buy cedar or oak. Both cypress and oak are hard, not easy to deform, and have similar medicinal value. The barrel has been painted, so the taste of the board itself is basically gone. Wooden barrels are easy to get moldy if they are not painted. It is better to go to the pharmacy to find a pharmacist to fumigate with drugs that suit you.