I remember having a DVD in the early 2000's that told a version of Mulan's story. It had to be very small studio since I can't find any mention of it on the internet. The animation was also kind of crude.
The plot involved a dragon who had to melt the snow from the mountains for people being able to water their fields. For some reason this hadn't happen for a while causing a drought and poverty. In middle of all this some evil general began a rebellion that Mulan had to encounter.
The story involved a magical medallion that turns into different animals, both monkey and a panda sidekick and some kind of test of different elements.
If I remember correctly she eventually found out that the dragon had failed to melt the snow because he was being drugged with opium by the bad guys. Very kid friendly :D