开始我们是陌生人最后我们是陌路人
[kāi shĭ wŏ men shì mò shēng rén zuì hòu wŏ men shì mò lù rén]
At first, strangers; ultimately, passing each other by: These words reflect a regretful mood about people who start as acquaintances but gradually distance until finally going out of each other's lives.