呼之即来,挥之即去

hū zhī jí lái , huī zhī jí qù

to come when called (idiom); ready and compliant

always at sb's beck and call

variant of 呼[hu1]

zhī

(possessive particle, literary equivalent of 的[de5])

namely

lái

to come

,

huī

to wave

zhī

(possessive particle, literary equivalent of 的[de5])

namely

to go