乘虚而入

See also: 乘虛而入

Chinese

For pronunciation and definitions of 乘虚而入 – see 乘虛而入 (“to enter or invade by exploiting of one's opponent's unpreparedness or weakness; to break through a weak point or advance when one's opponent is off guard”). (This term is the simplified form of 乘虛而入).
Notes: Simplified Chinese is mainly used in Mainland China, Malaysia, and Singapore. Traditional Chinese is mainly used in Hong Kong, Macau, and Taiwan.