diff --git a/3rdparty/fonts/fnt.cxx b/3rdparty/fonts/fnt.cxx
index 5cee716..458f65c 100644
--- a/3rdparty/fonts/fnt.cxx
+++ b/3rdparty/fonts/fnt.cxx
@@ -48,6 +48,8 @@ float fntTexFont::low_putch ( sgVec3 curpos, float pointsize,
 
   /* Auto case-convert if character is absent from font. */
 
+  //zhongjin
+  /*
   if ( ! exists [ cc ] )
   {
     if ( cc >= 'A' && cc <= 'Z' )
@@ -63,6 +65,8 @@ float fntTexFont::low_putch ( sgVec3 curpos, float pointsize,
     }
   }
 
+  */
+
   /*
     We might want to consider making some absent characters from
     others (if they exist): lowercase 'l' could be made into digit '1'