Erfan Hajrasooli Ha, known professionally as Erfan Paydar, is an Iranian rapper, singer, songwriter, producer, and label owner. He is one of the pioneers of Persian Rap. Erfan's "Az Khaneh Ta Goor" was one of the first professionally produced Iranian rap albums, released by a major record label. He is nicknamed the "Sun of Persian rap” by his fans. He is the founder of the label Paydar. He has a collaboration with Yas. His views are a result of his personal experiences and that is reflected in his poems. His songs provide a mixture of commentary on daily life as well politics, poetry, and social issues.
In addition to Az Khaneh Ta Goor, Erfan has, to date, released three more albums including, Hamishegi, Khodafezi and Ayatoltrap and Angizeh accompanied by Dara Paydar.
Erfan took a hiatus from music for two years following the release of Khodafezi. According to Erfan, the reasons for his farewell are fully stated in this album. Then, in 2018, he made his return with the release of the single "Khosh Oomadi" featuring Canis.