How far is it from left to right? Liu Yi often thinks that it is about one meter from the left hand to the right hand, and about a hundred kilometers from the left end of the city to the right end. It seems that it only takes an hour or two by subway or car. What about the human heart? The love of childhood is like going from left to right, from heartbreaking to silently waiting. This distance spans the entire youth. The world is not always pure and beautiful, and life does not always go as planned. Fortunately, I move forward recklessly, and when I look back, I have you.