According to Chao Yushi... Xia Jingzhi only officially entered his field of vision after killing Ren Xin, and only then did he arrange for people to investigate Xia Jingzhi.
Later, based on certain "fragmented" clues, Chao Yushi deduced that Xia Jingzhi was connected to "that matter."
That matter... was undoubtedly referring to the cause of the First Prince and Second Prince's deaths.
The deaths of the First Prince and Second Prince were taboo throughout the Chu Kingdom, and martial artists usually avoided mentioning them.
Chao Yushi had deliberately used the words "that matter" to allude to the cause of the First Prince and Second Prince's deaths.
Chao Yushi had arranged for people to investigate, gradually uncovering traces of Xia Jingzhi and learning that he had an extraordinary connection to the Southern Border Insect Valley.
Now that everything had been laid bare, Lin Bai asked bluntly, "Then how much do you know about Xia Jingzhi?"
"Not much." Chao Yushi furrowed his brow. "The Third Prince concealed this man very well. Especially after that matter, Xia Jingzhi rarely showed himself."
With a look of recollection, Chao Yushi said softly, "The last traces of Xia Jingzhi in the imperial capital date back to fifteen hundred years ago, when he traveled to the imperial capital as a wandering cultivator."
"At that time, he got into disputes with several young masters from prominent clans in the imperial capital. Later, those young masters died one after another under mysterious circumstances."
"After learning of it, the Zhao Xing Office began an investigation. In the end, they identified Xia Jingzhi and discovered that he was a traitor from the Southern Border Insect Valley."
"The Southern Border Insect Valley's demonic-world kill order was also sent to the imperial capital, so the Zhao Xing Office arranged for people to hunt