Athena Chu and Shu Han, d ā ng y ǐ ng qu á n xi.

Even a small favor should be repaid twice (in action)

Example: No matter how much others give us, we should know how to drop a drop of gratitude and repay it like a spring.

The source is "the grace of dripping water, spring comes." Zhu Zi's Letter is an augmented saint in Qing Dynasty. It was originally a folk proverb, widely recorded by newspaper people, and edited by Zhu Yongchun in Qing Dynasty. In order to teach children to wake up to the world, this proverb has been compiled into the explanation of 20 14 Beijing senior high school entrance examination questions.