Unable to figure out the Four-Colored Seal's uses for the time being, Xu Yi wasn't in any hurry to investigate. He casually put it away.
Next, he took the Ruyi Pearl embedded in the wall and brought up the image. He saw that after he had leapt through the light gate, the gate, the Purple Domain Space, and even the entire Four-Colored Seal had vanished into thin air. Only the alchemy chamber remained.
After staring blankly for a long while, Xu Yi gradually gathered his thoughts and lay down on the couch by the wall. When he awoke, it was already the hour of Chen.
After a simple breakfast, Xu Yi threw himself into studying the Way of Alchemy. His main focus was reproducing the three alchemical experiments newly proposed in the Dan Book.
Ninety-nine percent of the experiments mentioned in the Dan Book had already been tested in practice and had led to the derivation of important theorems.
Repeating these experiments was exceptionally difficult, but once an experiment of that level of difficulty had been successfully replicated, choosing a different angle from which to explain it often made it easy to produce a high-quality Dan Book.
So the key to producing a Dan Book lay in repeating the experiments.
And for Xu Yi, who had mastered the spectral system, repeating an experiment whose process was clearly laid out was hardly difficult.
The only difficulty might be obtaining the materials.
He was now outrageously wealthy, a walking fortress of riches. His Starry Sky Ring was piled high with all kinds of top-tier resources. Before entering the alchemy chamber, he had already gathered more than enough of the alchemical ingredients he would need for the experiments.
Seven days passed in the blink of an eye. He had completed his task almost