From the description of the film "Mulan" produced by USA-China on a well-known resource:

Hua Mulan is a woman who managed to enter military service in the absolutely male army. Her adventures were first described in the famous Chinese musical poem "Ballad of Mulan" in the 6th century. At the end of the twentieth century, "Ballad" became interested in the company "Disney" and created a masterpiece of animation under the same name "Mulan". Surprisingly, the animated story line is not very different from the new screenplay, with the only difference that instead of a fantastic presence in the cartoon of the dragon Mu-Shu, there is no less fantastic presence in the film of the famous Russian singer Vitas.