[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

顾影弄姿    顾而言他    顾景惭形    顾盼神飞    顾影惭形