The more he wrote, the more attention he paid to them. He simply stopped writing.
After thinking for a while, he crossed out the original "9, evening self-study" and began writing anew:
"9, areas within the campus that are illuminated by lights are safe, parenthesis: only lights installed within the campus count, portable light sources brought by oneself do not count."
"When the lights in the classroom begin to flicker, immediately crawl under the desk, stare at the legs of the desk with one eye squinted, or hug your head and look at the ground, and only come out after the lights restore."
"During this period, do not close your eyes and ignore all noises, and you shall be absolutely safe."
After finishing writing, he picked up the previous torn piece of paper, looked at "4:30," thought about it, wanted to add a tenth rule, but no matter how hard he thought, he didn't know how to write it, so he gave up for the time being.
But he added behind the original "4:30":