吃水不忘挖井人
chī​shuǐ​bù​wàng​wā​jǐng​rén

when drinking water, don't forget the well-diggers

吃水不忘挖井人 chī​shuǐ​bù​wàng​wā​jǐng​rén
when drinking water, don't forget the well-diggers
Do not forget the people who worked hard or sacrificed so that you could enjoy your current happiness; one should never forget their roots.