The ritual's content is indeed as such, but both the item and the person involved have specific requirements that are not easy to meet, sometimes requiring repeated attempts.
Ye Yuxuan did indeed swap out He Kao's Beast Claw Pendant. She was the sixth and last person to do so, meaning what she took was not the original. The original had long been switched by Qian Guran; the senior brother and sister were simply unaware of it.
Over a month ago, Wu Yanjun found his master uncle, Ye Hui. Of course, he also asked about their master's case. Ye Hui had already investigated and obtained a copy of the case file through his connections, finding some clues from it.
Following the trail, they happened to look into Zhou Du's case from back then. Investigating Zhou Du was a bit challenging because he had passed away twenty years ago, and much of the information was missing.