<正> Tongdong Gyibo, born in Ngaring County of the Xigaze Area, did much to develop Tibetan opera art, and the 5thDalai Lama then initiated the Tibetan opera festival to promote exchanges of ideas and the opera's further development.The blue mask performance school was the most influential among the Tibetan opera performance troupes. Of the four performance schools, three were founded in the Xigaze area: Joinpa school in Ngaring, Chianggarpa school in Rinbu and Shangpa school in Nam-