Hello dear friend.
I see you're learning Chinese but the characters are written in traditional way.
In fact many Chinese people prefer to use 云南 instead of 雲南. The Modern characters are simplified from traditional characters. But most people live in Taiwan use traditional characters.
And about 還南, I think maybe you meant 海南.
Both of 云南 and 海南 are provinces in China.
Anyway take a look at these two links: