關門捉賊 [关门－贼]

Jyutping gwaan1 mun4 zuk3 caak6
Pinyin guān mén zhuō zéi

Definitions (CC-CEDICT)
  1. to catch a thief by closing his escape route (idiom)
Definitions (Wiktionary)
  1. phrase, figuratively, idiomatic
    to capture the enemy by cutting off their escape route