HSK 7–9 · Practice
刻舟求剑
to act rigidly without adapting to change; to take measures too late
情况变了，还按老办法做就是刻舟求剑。
Qíngkuàng biànle， hái àn lǎo bànfǎ zuò jiùshì kèzhōu-qiújiàn。
The situation has changed; still using the old method is like marking the boat to find the sword.