"Everyone has also seen that our class is dirty and messy, because the first-year students in the previous class are now starting the second year, and they have moved to the third and fourth floors. This time the class is cleaned by new students. I think The other classes have started, and the bathroom will be crowded, so we might as well wait for a while, let's get to know each other, and we will clean up in groups later."

"Let's start with the first student in the first row, come to the podium."

Under Bai Yilin's signal, the first female student in the first row on the left stood up, a little shy, bit her lip, and squeezed her hands together: