Senses
后路/ 後路 route of retreat
A way back for a retreating army; lines of communication and supply to the rear
后路/ 後路 room to maneuver
An alternative course of action or a way to handle a situation if things go wrong; a backup plan
后路/ 後路 future path
(literary) One's future life path or long-term career prospects
后路/ 後路 road behind
The road or path that has already been traveled or lies behind one