千叮万嘱

qiān dīng wàn zhǔ

repeatedly urging

imploring over and over again

千

qiān

used in 鞦韆|秋千[qiu1 qian1]

叮

dīng

to sting or bite (of mosquito, bee etc)

万

wàn

ten thousand

嘱

zhǔ

to enjoin