The Grand Song, known as Dongzu Dage, is a unique and ancient form of choral music from the Dong ethnic group that primarily lives in the mountainous regions of southern China.

Unlike most traditional Chinese music, which tends to be monophonic (a single melody), the Dongzu Dage is polyphonic, with multiple independent lines sung simultaneously to create a rich, harmonious sound that captivates listeners.

Typically sung a cappella, the harmonies are complex. Singers often rely on their vocal strength and ability to harmonize in ways not commonly found in other traditional music.

In 2009, UNESCO inscribed the Grand Song of the Dong ethnic group on the Representative List of the Intangible Cultural Heritage of Humanity.

In August 2023, Yang Rui, a composer for Ne Zha 2, who focuses on integrating traditional music into film, came across a video on the popular Chinese social media platform Bilibili. It showcased Yang Xiangni and her team performing the Grand Song of the Dong ethnic group.

"The raw, natural beauty of the performance immediately captivated me," said Yang Rui in an interview. "The music was perfect for the scene where two characters sit gracefully atop large, radiant lotus flowers. The flowers, delicate yet expansive, add a spiritual aura to the setting.