7 degrees. According to QQ Music query, "Persuading Langge" belongs to the folk song category of Jiangnan folk songs. It has a neat structure and adopts the natural modulation technique of the Tonggong system to make the music innovative and more beautiful. The song has a range of 7 degrees. The song "Guanlangge" is a song written, composed and sung by singer Shang Qiong.