Introduction to the Dadong Immortal Sutra: The Dong Sutra music originated in the ancestral court of Wenchang and got its name from the performance of the "Wenchang Dadong Immortal Sutra". As the reputation of Emperor Wenchang spread far and wide, it went out of the temples and took root among the people. It absorbs the musical nutrition of all ethnic groups from all over the world and develops into an ancient folk music. Dongjing music is praised by UNESCO as a "precious cultural heritage of all mankind".