The Tibetan name of Tibetan opera is "Ajilamu", which means "fairy sisters". It is said that the earliest Tibetan opera was performed by seven sisters, and the content of the plays is mostly mythological stories in Buddhist scriptures, hence the name. Tibetan opera originated from the religious art of Tibetans in the 8th century. In the 17th century, it was separated from the religious rituals of the temples and gradually formed a life-like performance that mainly combines singing, chanting, dancing, performance, dialogue and skills. The singing of Tibetan opera is high-pitched and vigorous. It is basically determined by the person, and each sentence of the singing is assisted by human voice. Tibetan opera was originally a square drama, with only one drum and one cymbal accompaniment, and no other instruments. Tibetan opera is a general term for Tibetan drama. Tibetan opera is a very large drama system. Due to the differences in natural conditions, living customs, cultural traditions, and dialects in various parts of the Qinghai-Tibet Plateau, it has many art varieties and schools. Tibetan opera originated about 600 years ago, more than 400 years earlier than the Peking Opera, which is known as the quintessence of the country, and is known as the "living fossil" of Tibetan culture. Tibetan opera in Tibet is the mother of Tibetan opera art. It spread to the Tibetan-speaking areas of Qinghai, Gansu, Sichuan and Yunnan through monks who came to the U-Tsang monastery for further study and pilgrims, forming branches such as Huangnan Tibetan opera in Qinghai, Gannan Tibetan opera in Gansu and Seda Tibetan opera in Sichuan. Tibetan opera is also spread in Tibetan settlements in India, Bhutan and other countries. There are many types of Tibetan opera, but the mainstream is the blue mask Tibetan opera. The performance is generally divided into three parts. The first part is "Dun", which is mainly the opening performance of sacrificial songs and dances; the second part is "Xiong", which mainly performs the legend of the main play; the third part is called "Zaxi", which means blessing and welcoming auspiciousness. There are many types of Tibetan opera costumes, but the mainstream is the blue mask Tibetan opera. When performing Tibetan opera, the actors do not wear makeup, and they mainly perform with masks. Tibetan opera is divided into white mask opera and blue mask opera. In the process of spreading, the blue mask opera formed four major schools of Juemulong Tibetan opera, Jiongba Tibetan opera, Xiangba Tibetan opera and Jianggar Tibetan opera due to different regions.