There is a rainbow river in Wuming Mountain. Every time after a heavy rain, there is always a rainbow spanning both sides of the river with the brilliance of heaven and earth. It is really beautiful. At this time, there is always a boy about six years old, with a childish little face, sitting on the big stone by the river, looking at the rainbow very seriously in a daze. There is an old white dog next to the doll. Its matted hair is almost gone, lying lazily at the baby's feet. Sometimes the baby can't help but worry whether this old dog that has been with him for six years will suddenly die of old age one day.
Could it be tomorrow?
Could it be the day after tomorrow?