老弱残兵

tā bù kěn qiǎng bié rén de mǎi mai tè bié shì duì yú nà xiē lǎo ruò cán bīng

他不肯抢别人的买卖，特别是对于那些老弱残兵。

He had refrained from grabbing fares from others, particularly from down-and-out old, weak pullers.