Heng Sao Tian Ya

Traversing into another world, Zhang Xuan finds himself becoming an honorable teacher. 
Along with his transcension, a mysterious library appears in his mind. 
As long as it is something he has seen, regardless of whether it is a human or an object, a book on its weaknesses will be automatically compiled in the library. 
Thus, he becomes formidable. 
"Monarch Zhuoyang, why do you detest wearing your underwear so much? As an emperor, can't you pay a little more attention to your image?"  
"Fairy Linglong, you can always look for me if you find yourself unable to sleep at night. I am skilled in lullabies!" 
"And you, Demon Monarch Qiankun! Can you cut down on the garlic? Are you trying to kill me with that stench?" 
This is an incredible story about teachers and students, grooming and guiding the greatest experts in the world!
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Millman97

Library of Heaven's Path

StarveCleric

Daoist6fubtiW

"It's also possible that he's just browsing through the contents with his Spiritual Perception and not memorizing anything at all…" Nangong Yuanfeng remarked a short moment later.

Browsing through the content and memorizing them were two entirely different concepts.

The former only required one to scan through the book with one's Spiritual Perception; there was no need to attempt to understand or absorb the contents at all. On the other hand, the latter required one to commit everything that one had seen to memory. Naturally, the level of difficulty for both feats was vastly different.

If it was just browsing through several hundred thousand books at once, he was able to do it as well.

"Let's keep watching. We'll know very soon whether he's faking it or not!" Tantai Zhenqing replied.

Time Quintessence