Medicine, Qin Liuxi definitely has it, but whether it's the right remedy, it still requires experiments. Just like Miss Li before, the prescription she gave wasn't quite accurate. More importantly, the plague is accompanied by septicemia, which flares up quickly and abruptly. People die before they even have a chance to take the medicine.
Qin Liuxi is now using the Li Family as test subjects, having changed the prescription, just to see the effect. After seeing the symptoms of the people who died at the foot of the mountain, she secretly thought of administering a strong dose to the Li Family upon returning to the temple.
As for guilt, impossible. They committed sins first, and now being test subjects, they can redeem themselves by helping find the most effective prescription.
What they are doing now is to fight time fiercely, snatching lives from King Yan.
