Xu Huo knew more information than the others, the most crucial being the potion he obtained from Dr. Deng.
Perhaps Dr. Joyce was conducting breeding experiments with humans and degenerates, but at the same time, he probably didn't give up on conquering Black Thorn disease. The potion given by Dr. Deng was proven effective against Black Thorn disease, though more experimental subjects were needed to determine its exact efficacy. Since there have been some breakthroughs, Dr. Joyce likely wouldn't completely abandon this path.
However, he is already dead, and it's hard to say how far the research had progressed. Additionally, when the CK12 players retreated, they must have taken the related experimental products, whether it's the potion or the newborn "Melissa."
Black Under the Light and another person went to clear the sand again, while Xu Huo turned his back and took out the tracking device.
