What does it mean to sing a poem about Yuhai in Long song?

The poet chanted wonderful poems, and the poetry stirred like a sea of jade, which made the whole country integrate into the poems. This sentence shows that when the poet is immersed in the world of poetry, his own thoughts can stimulate the vitality of the surrounding scenery, as if the whole world is integrated into poetry, emphasizing the appeal of poetry and the poet's far-reaching influence on the world.