Pei Shu'er showed great concern for Tang Qinghua's well-being.
"Sister, if you want to hit me, that's fine, but why did you fall into the river? I thought you knew it was the riverbank. You see, no one from your family reminded you."
The implication being, you and your family don't care about you, so how could you blame an outsider like her?
Tang Qinghua angrily replied, "Pei Shu'er, stop trying to weasel out of it. I saw you stomped on the dirt on purpose, making me fall into the water."
"Sister, I didn't. You can ask others if I stomped or not."
Pei Shu'er looked innocent and aggrieved, her eyes reddening.
She finally sighed, seemingly not wanting to quarrel further with Tang Qinghua.
Everyone felt even more sympathetic towards Pei Shu'er.
After all, only she and Tang Qinghua saw her stomp on the ground.
After saying this, Pei Shu'er even handed a blood-circulation medicine to Tang Qinghua, knowing she's on her period, ensuring she'd bleed excessively after drinking it.