Ye Qing had no idea that after he left, the Seventh Elder was still in the room thinking about so many things. As soon as he walked out of the Seventh Elder's room, he immediately called over the technicians that Zhao Chengshuang had previously arranged and had them start locating and tracking that piece of paper.
With radioactive material on that paper, tracking it became much easier. Once these people had everything set up, the computer screen clearly showed the location of the paper—it was right inside the room where the Seventh Elder lived, which showed that this positioning and tracking operation had been very successful.
