The ways to read Chinese characters in QR code are, 
Way 1,
1. Set to USB virtual COM

2. Windows 7/8 need to install VCOM driver
   - Download file : VCOM
3. Run Keysimulator
   - Download  file : KeySimulator
 Way 2,
Read below settings, 

 
PS.BIG5 can test under Notepad;  UTF-8 can test under WordPad.