Everything started because of Eason Chan's "Ten Years". In that song, there is a hidden sound. When San'er discovered this wonderful sound ten years later, people and things had changed.
This can be considered a tragedy of missed love, but the sound in "Ten Years" seems to remind us of more. Sometimes, certain strong emotions leave a deep mark on our lives, but when everything passes and we can look back calmly, we find that life has its own hidden and complete trajectory. This shouldn't be a feeling of regret, but just looking at myself standing at the intersection at that time. That's all.