C1630 Could It be That the Cauldron Was Going to Explode?

Sima Fuyi and the others had to spend four hours to refine the main materials of the Thunder Nail. How long would it take to refine more than thirty main materials?

Sima Fuyi estimated that refining the main material of the Thunder Nail would take nearly nine days, and it was just dissolving the main material.

Other than dissolving the main material