Tā / kàn / dào / lǎo / rén / bèi / qī / fu / bù / jīn / gǎntàn / rén / xīn / bù / gǔ

他看到老人被欺负，不禁感叹人心不古。

Seeing an old person being bullied, he could not help lamenting the decline in morality.