分道扬镳

fēn dào yáng biāo

lit. to take different roads and urge the horses on (idiom)

fig. to part ways

fēn

to divide; to separate

dào

road; path (CL:條|条[tiao2],股[gu3])

yáng

variant of 揚|扬[yang2]

biāo

bit (of a bridle)