一拍即合

The number one; single; a; as soon as; entire; whole; all; a "one" radical in Chinese characters; also used for clarity when spelling out numbers.

to clap; to pat; to slap; to take a photo; to shoot a film; to beat (music); racket (sports)

namely; that is; i.e.; to approach; to come into contact; to assume office; at once; immediately; at present; even if

to close; to join; to fit; to unite; to gather; to be suitable; to match; to be equal to; whole; together