zéi​zǒu​guān​mén

to lock the door after the thief has left

Senses

贼走关门/ 賊走關門 zéi​zǒu​guān​mén to lock the door after the thief has left

(variant form) to lock the door after the thief has already gone; to take precautions only after the damage is done

References

variant 贼去关门/賊去關門 贼走关门/賊走關門