[gù fù zhī ēn]   

顾    复    之    恩    顾：回头看；复：反复。比喻父母养育的恩德。

顾复之恩，汉语成语，比喻父母养育的恩德。

The kindness of caring for -- saying of the sons for their parents' kindness

顾曲周郎    顾复之恩    顾此失彼    顾盼自豪    顾景惭形