solution:
1. The connection network, wifi / local connection
2. Open a terminal
3. Synchronize data
If this is the first time that we need to synchronize local data packet, the first input
sudo pacman -Syy
4. Install fonts
sudo pacman -S wqy-microhei
5. cancellation account login again [default theme is based on the lightning button pop-up menu]
Completion of the above operation will be able to solve the Chinese Chinese character.