参考答案： Hua Mulan is a heroine who joined the army for her father, according to what is described in a famous Chinese ancient poetry The Ballad of Mulan. Mulan's father is too old to bear suffering from the bitterness, and she doesn't have an elder brother to go and fight instead of the old father. So Mulan decides to disguised herself as a man to join the army for her father. Hua Mulan has been highly respected as a filial model by the Chinese people for hundreds of years, even though it is unknown whether the story has any factual basis. In 1998，her story was adapted into an animated cartoon by Disney of the United States, and the cartoon was very popular all over the world.