After Ace's vague interaction with Riana, he leaves everything to Eva, especially interrogating Antonio, but he doesn't have much hope since he knows the restriction placed on the imperial family's knowledge sea was most likely to originate from the Heavenly Mortal Emperor.
But he does have Antonio's space ring and the imperial family's secret treasury now, so he carefully skimps through them to find something useful or any clue about how the Imperial Family was in contact with the Heavenly Mortal Emperor.
After an hour of carefully analyzing the treasures, he had to admit that the Imperial Family really knew how to hide their wealth. There was a huge amount of grade-9 Qi stones and Soul Crystals, as well as some grade-9 treasures carefully stored in a precious jade box.
Now, Ace had enough sources of EXP and SP to reach the peak of stage 9. Other than that, there were many treasures from which he kept the swords aside and put the rest away.