A small sapling can grow into a towering tree, from two young leaves to a tree full of large leaves, lush and green, reflecting the brilliance of vitality. This is the gift of the roots to the green leaves, and the affection of the green leaves to the roots! Faced with the most selfless and unrequited kindness, I have no way of describing it. You gave me me, you gave me life, you gave me a home, but you only have strands of snow-white silver hair. Looking at the blue sky outside the window, I gently wrote you down and sang you gently.