"He truly spared no effort in teaching!"
Feng Qing'an simply flipped through one. It recorded a rather profound martial arts internal cultivation method, as well as matching methods for tempering the body, also known as horizontal training kung fu. As he continued to flip through the second one, the more he read, the more surprised he became.
No wonder this Military Judge has referred to these as martial arts manuals because they include almost ten different levels of chakra cultivation and even matching external skills. The necessary formulas for the single pills, diets, taboos, etc., required for cultivation, are all included.
Aside from the martial arts' internal and external arts, there are documented techniques using various weapons such as, knives, guns, swords, halberds, axes etc. These include detailed mastery and application of strength.