1, timbre and emotional expression: Gu Xun's timbre has a unique charm, and its deep and distant timbre can directly hit the listener's heart. In One Millennium, Yan's timbre is fully used to express deep affection. The tune uses the change of Yan's timbre to describe the vicissitudes, sadness, sadness, homesickness and other emotions in the long river of history.

2. Melody and historical expression: A thousand-year-old melody design is full of historical sense. With its unique rhythm, Yan vividly shows the massiness of history. At the beginning of the song, the melody is soothing and melodious, just like the long river of history flowing slowly, bringing the listener into the ancient historical world. With the progress of music, the melody gradually became passionate, showing the grandeur and agitation in the historical process.