How does the poet evaluate folk songs?

After Sui and Tang Dynasties, most of the folk songs sung by Shan Ye Murata were called "folk songs", which were used in the poems of Li Yi's "Folk Songs Smell Bamboo Branches" and Bai Juyi's "Of course there are folk songs and village management". The Collection of Recorded Folk Songs compiled by Feng Menglong in Ming Dynasty was also named after folk songs. Folk songs sung in the streets of towns are mostly called "tunes" or "songs". Song Wang Zhuo's "Blue Chicken Manzhi" says: "Since the Sui Dynasty, the so-called' songs' have gradually flourished in the Tang Dynasty, and today there are countless, almost countless." The "song" mentioned in this article is a folk song.