搔到痒处
sāo​dào​yǎng​chù

to hit the nail on the head

  1. 搔 sāo verb
    to scratch
    to scratch lightly with one's fingernails or an object
  2. 到 dào particle
    [resultative]
    used after a verb to indicate completion or success of an action
  3. 痒 癢 yǎng adjectiveverb
    to itch
    to itch; to tickle; itchy; a ticklish or itching sensation
  4. 处 處 chù noun
    point
    (bound form) A point, part, or aspect of something, such as a strength or weakness.