Sometimes life is like a river full of crocodiles, and we are all swimming down the river.
Sometimes we may miss a certain scenery in the past, and there are always people who dream of going back to the past. But when we go back there after desperately swimming upstream, the scenery on the shore has already changed.
And we find that we are bruised and bruised, but we are no longer the same people we used to be.
What have we lost? Maybe it's courage, or maybe it's the memory of a boy wearing a white shirt.