陌路同行必分离
[mò lù tóng xíng bì fēn lí]
'Fellow Strangers Bound to Part' captures the idea that two strangers walking together on life's path will inevitably part ways eventually. This signifies that despite forming connections with people along our journey through time and space, all relationships have a limited shelf-life leading to eventual separation, a common sentiment in many cultures about friendships.