顾复之恩
      Explanation: GU: look back; complex: repeated. The End parenting metaphor.
      Source: "Book of Songs Xiaoya Liaoe" Come with me Father, mother ... ... Come after me, I bow my recovery, and out of my belly.
      Examples: I have heard that father and son, from nature. Although the filial son, a father who bad idea missing the ~. (Yuan Shi Jun Bao "Qu Jiang Liu," The fourth fold)