吃水不忘掘井人 - Chinese Idiom

吃水不忘掘井人

Literally means:

hold gratitude for the well-digger when consuming water

Actually means:

It figuratively means that when one lives in happiness, he should not forget the one who has contributed to his happy life.

It connotes that one should remember, acknowledge or repay the "well-digger". The phrase is usually used to express gratitude, to commemorate, or to remind.

喝水的时候不忘记挖水井的人。

比喻生活幸福美满时，不要忘了使你幸福的人。

表示要记住，或感谢，或报答他们。多在感激和怀念或提醒时使用。