乘虚而入

wǒ jūn chéng xū ér rù shì rú pò zhú

我军乘虚而入，势如破竹。

Our troops took advantage of the enemy's weakened position and cut in like a knife slicing down a length of bamboo.

mí huò cāi yí néng shǐ yī gè qǐ yè biàn de cuì ruò yǐ zhì ràng wài dí chéng xū ér rù

迷惑、猜疑能使一个企业变得脆弱，以致让外敌乘虚而入。

Confusion and suspicion will make the organisation vulnerable to external exploitation.

tā cháng shì chéng xū ér rù zhǎo dào zhǎng quán kòng zhì de jī huì

他尝试乘虚而入，找到掌权控制的机会。

He tries to find a place where he can enter and seek to take control.