Gong Xian heard what Fei Yin said and thought that what he said made sense. So, he turned to ask Ki Le about it to verify their guess. And, it is as they guessed when Ki Le answered.
"That is right. How did you know?" Ki Le asked as he looked at them in surprise instead of suspicion.
Ki Le is not suspicious of them or where they get their information for he knows how tight the information is in their sect. Wasn't it the case with their sect leaders who forced their chosen successors to be the next sect leader? So, Ki Le was surprised that they knew
"Ah." Ki Le muttered when he suddenly recalled something. "Was it Cheng Sheng?" he asked.
"No." Gong Xian answered. "We cultivators are very familiar with how spiritual veins work, so we guessed this case about your sect leaders' early death." He explained. "But, yes, Cheng Sheng should have already known about this, that is why he muttered before about curses and oaths." He told Ki Le.