take advantage of sb . 's undefended state to attack(chéng xū dǎo xì)

take advantage of sb . 's undefended state to attack

As a Chinese idiom, Pinyin is ch é NGX ū D ǎ ox ì, which means that the words are just to the point. It is compared to percussion. From Lao Can's travels.

The origin of Idioms

Chapter 10 of Lao Can's Travels: "Huang Long raises the chime to strike, and on the chime, he clangs, harmonizes, and takes advantage of the gap."

Idiom usage

To act as a predicate or attributive

Chinese PinYin : chéng xū dǎo xì