无孔不入

wú kǒng bù rù

to get in through every crack; all-pervasive

Character by character

无wú
no

孔kǒng
hole

不bù
not

入rù
enter

现在的广告无孔不入，连电梯里都是。

Advertising now gets in everywhere, even in the lift.

Tone: negative (criticism).

Learn this in Lesson 53 · HSK 6: 互联网巨头 (The internet giants)

A dialogue, a reading, word cards with audio and a drill that uses it, in Learn Chinese with Bao. This lesson is free.