A Disappointing Searching For Cultivation Recipes

After Fei Hong was surprised by the condition of the place, he walked around the house and started to read the books, one by one, from the bookshelf. 

When he opened the first book, he followed silently and said: "In the dantian, gather the acupoints of Yin; the book of the Shutianshu, the gate of the sun... Is this?"

The more he read, the more he felt that something was wrong with what he was reading, and he returned to the book cover to take a look: "The cave of heaven and earth..."

By the heavens, wasn't this the place to put pill recipes and utensil recipes? Why was there a book explaining the acupuncture points of the human body? 

Fei Hong threw the book in his hand away and smiled bitterly. Immediately after reading one book after another, when he finished going through the second bookshelf, he was about to collapse.