Gāokǎo fùxí yī kāishǐ, quán bān jiù juǎn qǐlái le.
Once gaokao review started, the whole class went into full grind mode.
Tips
culture
The figurative use is from 内卷 (involution). When a group 卷起来, people escalate effort to the point where it stops paying off for anyone. Heavy internet-era buzzword, especially for tech and education.
