dí / rén / fáng / shǒu / chū / xiàn / lòu / dòng / shí / bù / néng / ràng / duì / shǒu / chéng / xū / ér / rù

敌人防守出现漏洞时，不能让对手乘虚而入。

When the enemy's defenses show a weakness, you must not let your opponent take advantage of it.