If life is a song, then we are the singers, singing and playing the notes of time. If life is a mountain, then we are the climbers, standing on the peak and grazing our souls. The aging of years is like the growth of tree rings, and the depth of thoughts is like the river that flows through it. As time passes, we tend to forget our promises, forget the past celebrations, but who has not made a promise in their life? Who can say they have kept all their promises? One journey, one stranger, one story - when we part ways, no explanation is needed. If fate brings us apart, then you and I will be okay, whether it's sunny or cloudy outside is no longer important. In life, the hardest door to open is the heart door, the hardest road to walk is the heart road, the hardest bridge to cross is the heart bridge, and the hardest thing to adjust is our attitude. The world's most difficult project is to transform a person's inner world. Warmth can be disguised, romance can be created, beauty can be decorated, but only heartache is the most original emotion.