First of all, "Shaoling" is Du Fu's own name, because he once lived near Shaoling in Chang 'an, so he was called "Shaoling". "Articles that shocked the whole country" is a description of Du Fu's poems, which shows that his poems have attracted wide attention and praise all over the country and can be compared with cultural leaders at that time.
Secondly, "the poet and sage are radiant" is an exaggerated expression of Du Fu's contribution and influence in the field of poetry. "Poetic Sage" is a respectful title to Du Fu, indicating that he is a leading figure in poetry, and no one can match him. "Brilliance" is an exaggerated expression, which describes the influence and radiance of Du Fu's poems and lasts for a long time.
Generally speaking, this sentence is praising and affirming Du Fu's poetic talent and position, which shows that his poems enjoy a high reputation in the whole country and have a far-reaching impact on later poetry creation.