ㄨㄟˊwéiㄔㄥˊchéngㄉㄚˇㄩㄢˊyuán

  1. 軍事一部分兵力包圍據守城鎮據點敵人使其他地區敵人救援然後事先部署兵力殲滅作戰方法

to besiege and strike the relief force (idiom)​; strategy of surrounding a unit to entice the enemy to reinforce, then striking the new troops