Lin Li was certain that Gerian was not the first person to have read the diary in the thousand of years. The content of the diary was full of vague hypotheses. Anyone would have deemed it as something created to trick people.
However, now that Lin Li had found the underground palace, he could be sure that its author had to be somebody who had lived in the past. Then, might he be able to glean some clues from the diary? Although Gerian did not bring the original diary with him, he had written down all of its contents based on his memory into a notebook and passed it to Lin Li when they parted ways.