Li Xuan had a tremendous advantage in the realm of Wuyi in the past.
He was able to use the armguard "Taotie, the Gluttonous Beast" and "Wuqu Pojun" to forcibly restrain the True Spirits of Wu cultivators, search for their insights into the true meaning of Martial Law, and assimilate them for his own use.
Even if some true meanings of Martial Law were incompatible with the path Li Xuan was on, he could still draw parallels and extend the knowledge widely.
However, as of now, "Wuqu Pojun" provided less and less assistance to Li Xuan in this regard.
Luckily, at this time, Li Xuan still had two other directions to explore.
When Li Xuan close his eyes and entered meditation for roughly the duration of three breaths, a surge of pure white Hao Qi suddenly condensed in front of him, forming the words "Truth" and "Principle".
This was the Rule of Extreme Heaven he was about to deduce from Hao Qi—called "Truth", yet it could be bifurcated into two major principles: truth and reason.