how wpa_suppliant processes the chinese characters

[root]

dear all:
   merry christmas!
   i am from china, so some of our ap's ssid is chinese characters,but
 when i use the wpa_gui to scan, and i got the scan_result is something
 like "______",so i want to know where is the wpa_suppliant process the
 ssid, and maybe i can do some changes on it and make it to  support
 chinese character.
    hope you can give me any advice, thanks for advance!
 best regards!