趁虛而入 chèn xū ér rù

DEFINITIONS

  1. take advantage of vulnerability to enter; seize the opportunity to make a move, especially at a moment of weakness

CHARACTERS

趁 chèn
HSK 5
take advantage of, avail oneself
虛 xū false, worthless; empty, hollow
而 ér
HSK 3
and; and then; and yet; but
入 rù
HSK 4
enter, come in(to), join