During the Northern Wei Dynasty, Mulan joined the army for his father and returned with honor. Ten years later, Rouran broke the border again, and Mulan resolutely returned to the battlefield.
During the Northern Wei Dynasty, the Rouran army invaded the border, and the country called up military residents to go out to battle. To perform the duty for her father, Hua Mulan disguised herself as a man and came to battlefield.