I connected the entire incident together and roughly grasped the gist of things.
Su Qiang struggled to get up, wanting to say something.
But Yu Longting's relentless pressure on her head forced her to shrink back down, "The demon spawn was originally in that lake; Qingyang told me its location. At first, it was very weak, and it took a lot of rats to... to grow it strong enough to hunt on its own."
"Without the Rat Immortal Robe, how were you controlling the rats?" I figured in my mind that everything Su Qiang knew about the demon spawn came from Qingyang.
But Qingyang's words might not be true, and no matter how much I pressed Su Qiang, it was useless. The situation came full circle back to the starting point.
Therefore, I didn't continue to inquire about the demon spawn, but switched to asking her about how she could control the rats.
