Zou Liqin was a bit unsure at first, but as more time went by and the sound didn't dissipate, she became sure what she heard were indeed sounds made by swallows.
She was bewildered by the whole thing, but then she suddenly remembered what Yu Mei had said earlier when she spoke about hearing the voices.
Zou Liqin gently touched her heart as she recalled her explanation of why she could hear those noises while Zou Liqin, Zou Yi, and He Shan couldn't.
The prerequisite of hearing those voices was for someone to have a sense of calmness. The latter two, i.e., Zou Yi and He Shan, were already suffering from the side effects of the red suckle berserker mushroom, which left them in an agitated state. At the same time, Zou Liqin had the four-year demons courtesy of the heart-cleansing waterfall to deal with, and even after when the trio had passed out, she was in a panicked and frantic state at being the only one conscious and overwhelmed by the weight of that reality.
