Nahana Must Be Folded and Finally Must Be Folded (Part 2)

The flowers bloom and fall, the flowers gradually fade away, the green leaves and withered leaves grow sad; We don't know who is who, only when the flowers bloom and we can't help it. The flowers will wither, but the leaves will remain. The flowers bloomed again, but it was no longer the pear blossom blooming on the branches. Conception: