Only those who were qualified could enter.
With that one sentence, Lin Xiao clearly understood what Prince Lin San was trying to tell him. He could try to aim for it but it was clear that he might not even have the chance to even see the cover unless he blurted out his real identity.
But it was a secret that he didn't wish for others to know. At least, not until he was ready to face so many people who were aiming for his life.
"Can you enter?"
"As a matter of fact, I did enter once." Prince Lin San let out a faint laugh. "I can only choose one martial art before leaving the library because it's really restricted. There are a lot of elders stationed there to guard the palace."
"Oh."
"When your identity is revealed, you might be able to get one chance in the future. But I can't say about this for sure because it's not certain."