char field length get 2 times in GB2312

[Shuming Wang]

Hi,
  After  SET CHARACTER SET GB2312 , create table a1 (b1 char(6)) 
charset=gb2312, the char field width in 2 times.

  select * from a1

   胶版材料重量
   123456
   金属材料12

   Should be

     胶版材
     123456
     金属材
  
  server : win98/linux mysql4.1.11 
  client : windows ,bcc55,libmysql.dll 

Regards
Shuming Wang