The sub-section of Yongle Dadian contains many documents, such as Music Score, Music Rhythm, Music Rhythm Complete Book, Guangling San and so on, covering the information of China ancient music theory, music and musical instruments.

Yongle dadian is a kind of book compiled by Jie Jin, Yao Guangxiao and others under the orders of Zhu Di, the Ming emperor, during the Yongle period of Ming Dynasty, which is a collection of Yu Dacheng, an ancient book in China.