When Li Yan heard the surname "Liu" and a clear description of the pair's appearances, he was almost certain that the enemies Mo Sen and Senior Brother Jiang Xuan had encountered were Yan Qingchen and Liu Siyu.
It reminded him how difficult Yan Qingchen was to deal with. The man was quick-witted and ruthless. As Li Yan's cultivation deepened, he found that whenever he thought back on Yan Qingchen, the man seemed harder to handle than many Body Integration Realm cultivators.
Li Yan had always planned for every contingency, yet every scheme and attack he had been certain would kill Yan Qingchen had been evaded. It had led to one failure after another, and he himself had nearly fallen into the man's trap...
Li Yan briefly told Pei Buchong and Ping Tu where the two had come from. His trip to Yellow Qi Valley was no secret in the Five Immortals Sect, but he left out everything concerning the Undying Underworld Phoenix.
That secret concerned an entire race. Li Yan did not know what form his dealings with them would ultimately take. Now was not the time to speak of it.
"You met these two in Yellow Qi Valley, Junior Brother Li, and you saw Yan Qingchen kill a fellow disciple in the secret realm. Then, after leaving, he vanished for no apparent reason. Had he gone to that sect to look for something...?"
Since Li Yan had spoken of his past encounters with Yan Qingchen and why he had grown suspicious of him, he had to explain what was suspicious about the man's appearance there.
But here, Li Yan said only that after seeing Yan Qingchen kill someone, he had detected yin-yang power within the man's techniques. That was why he had judged Yan Qingchen might be a Yin-Yang