随叫随到
suí​jiào​suí​dào

be on call

  1. 随 隨 suí adverb
    immediately
    used to indicate that one action happens immediately after another, as in the 随...随... suí... suí... pattern
  2. 叫 jiào verb
    to summon
    to summon; to call for; to hire; to order food or a taxi
  3. 随 隨 suí adverb
    immediately
    used to indicate that one action happens immediately after another, as in the 随...随... suí... suí... pattern
  4. 到 dào verbpreposition
    to arrive
    to arrive at a place; to reach a point in time; to reach a certain level or stage