Zhang Ningzhi would also feel sleepy during class; she usually chose to lie on the desk while listening.
Listening to the class while catching up on sleep, since the books were piled high anyway.
Although the teacher could see everything from the podium, it was like trying to cover up your own ears while stealing a bell. It's okay if you can't fool the teacher, fooling yourself works too.
At this moment, Zhang Ningzhi clearly felt a bit sleepy.
The air in this classroom was like taking sleeping pills, whether sitting or standing, you'd feel sleepy. If you hadn't eaten enough, you'd be sleepy; if you'd eaten too much, you'd still be sleepy. The afternoon was even worse, making people feel completely exhausted.
Scientifically explained, it's because there are many people and little space; over sixty people in a classroom breathe in and out together.
In the afternoon, if the windows weren't opened, it would make the sleepiness boundless.
