Yun Yubai's heart was in turmoil. He had always known he was found by villagers and had long wondered who his biological parents were. Hearing this, he became even more confused and finally asked, "Elder Qing Feng, what do you mean by this? Could it be... could it be that my father is still alive?"
Qing Feng shook his head, "No, but in Jialan's library, there is a painting of Celestial Emperor Yining, along with many of his personally written texts and chess scores."
Every major sect has its own library, and they don't easily lend their collections. Some of the most profound and important works are off-limits to ordinary disciples. The fact that Celestial Emperor Yining's collection is housed in Jialan explains why people like Cinian haven't heard of him.