The reason for this is the following：
1. Unique theme: Song of Dawn is about the love between a knight and a lady. This kind of love is elegant and romantic. It broke through the asceticism and afterlife concept of general religious poetry and expressed the knight's pursuit of real life and happiness.
2. Strong emotional expression: "Song of Dawn" shows the knight's sincere and deep feelings by describing the separation between the knight and the lady at dawn, which makes the poem have strong appeal and artistic charm.
3. Literary value: Song of Dawn is in the form of lyric poetry, with beautiful words and far-reaching artistic conception. It embodies the characteristics of medieval knight literature and becomes a model of poetry in this period.