"Shut the Door to Catch the Thief" literally means to close the door and capture the thief. As one of the Thirty-Six Stratagems, its core lies in: when the enemy is isolated, weak, or has penetrated deep into our territory, we should swiftly cut off their retreat, form an encirclement, and then annihilate them in one stroke. This stratagem emphasizes "siege" rather than "assault" — by blocking exits, cutting off supplies or reinforcements, the enemy is driven into a hopeless situation and ultimately forced to surrender or be destroyed. Militarily, it is often used against small invading forces or isolated troops; in business competition, sports, and even daily life, it can be extended to mean: first block all possible retreats or excuses of the opponent, then solve the problem at leisure. This idiom carries a tone of initiative, decisiveness, and cleverness, embodying both meticulous strategic planning and the unshakable confidence of certain victory, like "catching a turtle in a jar."
📝 Example
1. The police sealed off all exits in advance, catching the thieves by shutting the door, and rounded up the entire criminal gang. (In this sentence, it means cutting off escape routes first, then carrying out the arrest.)
2. In the negotiation, he first rejected all of the other side's alternative proposals one by one, then caught the thieves by shutting the door, forcing them to accept his terms. (In this sentence, it means blocking all the other side's escape routes so that they had no choice but to comply.)