As for Chen Xuan having learned the "River Luo Footwork" and boosted his strength, it was completely a non-issue for Lu Wuji.
Obtaining the Fuxi Zhenwu Diagram and ascending to the peak of the martial arts world was the lifelong pursuit of the old ghost king of the Netherworld Sect. Lu Wuji had inherited his father's dying wish, so he placed putting the Zhenwu Diagram above all else, while putting revenge in second place.
Furthermore, once he obtained the Zhenwu Diagram and comprehended the ultimate mysteries of the martial arts within it, killing Chen Xuan and Shang Bohuai at that time would be effortless.
Chapter 2182