当官不为民做主不如回家卖红薯
dāng​guān​bù​wèi​mín​zuò​zhǔ​bù​rú​huí​jiā​mài​hóng​shǔ

serve or resign

当官不为民做主不如回家卖红薯 (當官不為民做主不如回家賣紅薯) dāng​guān​bù​wèi​mín​zuò​zhǔ​bù​rú​huí​jiā​mài​hóng​shǔ
serve or resign
if an official does not put the people first, he might as well go home and sell sweet potatoes

Sources
Definitions
CC-CEDICT