章 52: 023 Differential treatment, fair and just_1

Eight o'clock.

The other students in the lecture hall began to pack up their belongings reluctantly, their faces filled with gloom as they left; it was obvious that the problems left behind today were too difficult, and half an hour wasn't enough for them to even sketch the diagram for the first sub-question.

As soon as the clock struck the hour, Ning Xiao packed up his things and turned to look at Bai Lian.

Bai Lian had found the dispersion curve in Jiang Fulai's notebook and had figured out the minimum angle of deviation.

She methodically placed the pen cap, books, and notebook in order.

Ning Xiao hung his head, his pale fingers twitching, seemingly with the impulse to help her get organized immediately.

The two of them left one after the other, and Tang Ming also lifted his head from that problem. He quickly packed up a pile of messy items and slightly raised his voice, "You two go ahead, I'll be right there."