Bìyè zhīhòu, lǎo tóngxuémen jiù fēndào yángbiāo le.
After graduation, the old classmates all went their separate ways.
Tips
history
From the Northern Wei dynasty. Two officials argued about who had the right of way on a road. Rather than yield, they agreed to each take a different path — 分道揚鑣. 鑣 (biāo) is an archaic word for a horse's bit/bridle.
usage
Often implies a permanent or significant split — a relationship, partnership, or friendship ending. More dramatic than simply going in different directions.