After more than an hour, Lin Qingzhu opened her eyes. It was clear that her understanding of the "Taiyin Yan Shen Technique" was not deep enough, as she felt the practice wasn't going smoothly.

So she temporarily stopped practicing and asked Ning Wangshu for advice.

After Ning Wangshu patiently explained, Lin Qingzhu continued her practice...

In the blink of an eye, the sky outside had darkened without her noticing.