呼之即来，挥之即去
hū​zhī​jí​lái​huī​zhī​jí​qù

at someone's beck and call

  1. 呼 hū verbnoun
    to call
    To call out to someone; to summon or beckon; to address someone as a certain name or title
  2. 之 zhī pronoun
    it
    Used only in the object position to refer to a person or thing already mentioned, meaning "him", "her", "it", or "them".
  3. 即 jí adverb
    immediately
    promptly; at once; indicates that something happens right after something else
  4. 来 來 lái verb
    to come
    To come; to arrive; to move toward the speaker; to crop up or happen
  5. ， huī
    non-Chinese
  6. 挥 揮 huī verb
    to wave
    to wave; to brandish; to swing a hand, weapon, or tool
  7. 之 zhī pronoun
    it
    Used only in the object position to refer to a person or thing already mentioned, meaning "him", "her", "it", or "them".
  8. 即 jí adverb
    immediately
    promptly; at once; indicates that something happens right after something else
  9. 去 qù verb
    to go
    to go to a place; to leave or depart; to go in order to do something