"They said we'd continue to delve into the Blood Evil Secret that afternoon," Zhao Changhe didn't continue his visit to Jingxin Temple to see Lu Shaohong, nor did he go to inquire about the third young master of the Gu family. Instead, he made another trip to the Huqiu Sword Pond.
Seeing Zhao Changhe circling the pond, closely observing it, Sisi was quite puzzled.
Anyone analyzing the situation should have considered the Huqiu Sword Pond a red herring. The real source of Evil Qi must be elsewhere, as both the young masters from the Lu and Gu families were tainted. It would be logical to search for a place they both visited in common.
For instance, Tang Buqi was doing just that with the Gusu Demon Suppression Department, which Sisi thought was a rare instance of the young master doing something reliable.