Why did Du Mu dare to shout Du Fu, and what was his comprehensive strength?

Du Mu dares to call Du Fu because he is a formidable figure. His comprehensive strength is actually comparable to that of Du Fu, but compared with Du Fu, he is a little less lucky. Moreover, he was not in a particularly good time. Du Mu has always been called Xiao Du by later generations. Because his predecessor Du Fu was already a famous figure, in the Tang Dynasty, everyone knew two figures: one was the poet Li Bai and the other was the poet Du Fu. Because of their great achievements in poetry, they had a great influence on people at that time. But Du Mu doesn't feel much worse than Du Fu. So in fact, more or less, I still mind being called Xiao Du. Du Mu can shout Du Fu, which shows that he is also a more powerful person. Judging from his life experience, Du Mu was born better than Du Fu. Therefore, whether in contact with people or in the education received since childhood, it will be better than Du Fu, who was born in an ordinary family. Although Du Mu is a man of noble birth, he is competitive himself. Unlike many dude, don't do business, indulge in debauchery. His own attainments in literature are still relatively high. But unfortunately, he lived in the late Tang Dynasty. At that time, both economy and culture in the Tang Dynasty were slowly declining, which was not as good as before. Therefore, Du Mu's poems are more regrets in the late Tang Dynasty. Although he is a talented person, he didn't meet a good time, so his poems are not as good as those of Li Bai and Du Fu. Nature is also called komori. Generally speaking, Du Fu and Du Mu have made great contributions to the development of China's poetry. It's just that there are people on a first-come-first-served basis, and there was Adu Fu before, so Du Mu can only be called Xiao Du. But his comprehensive strength is also very strong.