A clause in Eddie Murphy's contract for doing Shrek 2 (2004) forbade him from reprising the role of Mushu in this film, therefor having his other voice actor Mark Moseley (a man best known for filling in for Murphy's characters like Mushu and Donkey in their TV and Video Game appearances) fill in for this film.
Mulan's family name, Fa, should actually be pronounced Hua. Fa is the south Chinese (Canton) pronunciation used in Hong Kong and the surrounding area, Hua is the north Chinese (Mandarin) pronunciation used in much of the rest of China and on state television. Both share the same written form and mean 'flower'. The Chinese dub uses the Hua pronunciation as Mandarin is China's official language.
The trivia items below may give away important plot points.
In behind the scenes footage, when Ming-Na Wen, voice of Mulan, did the scene where Shang falls down to his "death" even though he actually survives as we found out later in the movie, Ming-Na cried doing that scene and said it was emotional to do voice acting for that scene. She also said her mother even cried when she saw Ming-Na doing the scene and said to her: "Ming-Na! Why cry? It's a cartoon, why cry?"