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diff --git a/language/chinese/CJK/cjk-4.8.5/utils/CEFconv/cefconv.w b/language/chinese/CJK/cjk-4.8.5/utils/CEFconv/cefconv.w
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+% This is the cweb file cefconv.w of the CJK Package Ver. 4.8.5 16-Oct-2021
+
+% Copyright (C) 1994-2021 Werner Lemberg <wl@@gnu.org>
+%
+% This program is free software; you can redistribute it and/or modify
+% it under the terms of the GNU General Public License as published by
+% the Free Software Foundation; either version 2 of the License, or
+% (at your option) any later version.
+%
+% This program is distributed in the hope that it will be useful,
+% but WITHOUT ANY WARRANTY; without even the implied warranty of
+% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+% GNU General Public License for more details.
+%
+% You should have received a copy of the GNU General Public License
+% along with this program in doc/COPYING; if not, write to the Free
+% Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+% MA 02110-1301 USA
+
+% To print this CWEB file you should (but not must) use the CWEAVE of the
+% c2cweb-package (found at the CTAN archives, e.g. ftp.dante.de) and then say
+%
+% cweave +a cefconv.w
+%
+% This (fully compatible) CWEAVE can transform CWEB-files with alternative
+% output rules (look at the position of braces below!) the author (it's me
+% too :-) prefer. Otherwise this file will be formatted traditionally.
+
+\def\title{cefconv (CJK Version 4.8.5)}
+
+\def\topofcontents{
+ \null\vfill
+ \centerline{\titlefont The {\ttitlefont cefconv} program}
+ \vskip 20pt
+ \centerline{(CJK Version 4.8.5)}
+ \vfill}
+
+\def\botofcontents{
+ \vfill
+ \noindent
+ Copyright \copyright\ 1996, 1998, 2002 by Werner Lemberg
+ \bigskip\noindent
+ Permission is granted to make and distribute verbatim copies of this
+ document provided that the copyright notice and this permission notice
+ are preserved on all copies.
+
+ \smallskip\noindent
+ Permission is granted to copy and distribute modified versions of this
+ document under the conditions for verbatim copying, provided that the
+ entire resulting derived work is distributed under the terms of a
+ permission notice identical to this one.}
+
+\pageno=\contentspagenumber \advance\pageno by 1
+\let\maybe=\iftrue
+\fullpageheight=240mm
+\pageheight=223mm
+\pagewidth=158mm
+\setpage
+\frenchspacing
+
+\noinx
+\nosecs
+\nocon
+
+@* Function and Use.
+This small program will convert EUC encoding with CNS encoded Chinese
+characters using the {\it Chinese Encoding Framework (CEF)} into a
+`preprocessed' form, expanding the CEF macros.
+
+Use this program as a filter:
+
+\hskip 2em \.{cefconv < input\_file > output\_file}
+
+
+@* The program.
+In contrast to \.{cef5conv} or \.{cefsconv}, only one task will be executed:
+
+Replacing CEF macros of the form \.{\&xx-yyzz;} (\.{xx} can be C1--C7 for
+the CNS planes 1--7, C0 for Big~5 encoding, an encoding CX reserved for
+IRIZ, a private encoding CY, and U for Unicode encoding; \.{yyzz} is a
+hexadecimal representation of the code point in this plane) with
+\medskip
+\quad\.{\char94 \char94 7f72\char94 \char94 7fXX\char94 \char94 7f%
+\char94 \char94 7f"0yy\char94 \char94 7f"0zz\char94 \char94 7f}\quad.
+\medskip
+\.{XX} is the corresponding CJK encoding of \.{xx}; the number `72'
+specifies a macro in the file \.{MULEenc.sty} which further processes this
+representation -- it is automatically loaded by the \.{CJK} package.
+
+Additionally we define an empty \TeX\ macro at the very beginning to signal
+a preprocessed file.
+
+The following code is very simple. No error detection is done because \TeX\
+which will see the output of \.{cefconv} complains loudly if something is
+wrong.
+
+@d banner
+"cefconv (CJK ver. 4.8.5)"
+
+@c
+#include <ctype.h>
+#include <stdio.h>
+#include <stdlib.h>@#
+
+
+int main(int argc, char *argv[])
+ {int ch, i;
+ unsigned char in[16];
+ unsigned char out[32];
+ unsigned char *inp, *outp;
+
+ fprintf(stdout, "\\def\\CNSpreproc{%s}", banner);@#
+
+ ch = fgetc(stdin);@#
+
+ while(!feof(stdin))
+ {if(ch == '&') /* the macro test is hardcoded to make things simple */
+ {inp = in;
+ outp = out;
+ *inp = ch;
+ *(++inp) = fgetc(stdin);@#
+
+ if(*inp == 'C' && !feof(stdin))
+ {*(++inp) = fgetc(stdin);
+ if(*inp == '0' && !feof(stdin))
+ {*(outp++) = 'B';
+ *(outp++) = 'g';
+ *(outp++) = '5';
+ }
+ else if(*inp >= '1' && *inp <= '7' && !feof(stdin))
+ {*(outp++) = 'C';
+ *(outp++) = 'N';
+ *(outp++) = 'S';
+ *(outp++) = *inp;
+ }
+ else if((*inp == 'X' || *inp == 'Y') && !feof(stdin))
+ {*(outp++) = 'C';
+ *(outp++) = 'E';
+ *(outp++) = 'F';
+ *(outp++) = *inp;
+ }
+ else
+ goto no_macro;
+ }
+ else if(*inp == 'U' && !feof(stdin))
+ {*(outp++) = 'U';
+ *(outp++) = 'T';
+ *(outp++) = 'F';
+ *(outp++) = '8';
+ }
+ else
+ goto no_macro;@#
+
+ *(++inp) = fgetc(stdin);
+ if(*inp != '-' || feof(stdin))
+ goto no_macro;@#
+
+ *(outp++) = '\177';
+ *(outp++) = '\177';
+ *(outp++) = '\"';
+ *(outp++) = '0';@#
+
+ *(++inp) = fgetc(stdin);
+ if(isxdigit(*inp) && *inp < 0x80 && !feof(stdin))
+ *(outp++) = toupper(*inp);
+ else
+ goto no_macro;@#
+
+ *(++inp) = fgetc(stdin);
+ if(isxdigit(*inp) && *inp < 0x80 && !feof(stdin))
+ *(outp++) = toupper(*inp);
+ else
+ goto no_macro;@#
+
+ *(outp++) = '\177';
+ *(outp++) = '\"';
+ *(outp++) = '0';@#
+
+ *(++inp) = fgetc(stdin);
+ if(isxdigit(*inp) && *inp < 0x80 && !feof(stdin))
+ *(outp++) = toupper(*inp);
+ else
+ goto no_macro;@#
+
+ *(++inp) = fgetc(stdin);
+ if(isxdigit(*inp) && *inp < 0x80 && !feof(stdin))
+ *(outp++) = toupper(*inp);
+ else
+ goto no_macro;@#
+
+ *(outp++) = '\177';
+ *outp = '\0';@#
+
+ *(++inp) = fgetc(stdin);
+ if(*inp != ';' || feof(stdin))
+ goto no_macro;@#
+
+ outp = out;
+ fprintf(stdout, "\17772\177");
+ while(*outp)
+ fputc(*(outp++), stdout);@#
+
+ ch = fgetc(stdin);
+ continue;@#
+
+no_macro:
+ ch = *inp;
+ i = inp - in;
+ inp = in;
+ while(i--)
+ fputc(*(inp++), stdout);
+ continue;
+ }
+ else
+ fputc(ch, stdout);@#
+
+ ch = fgetc(stdin);
+ }
+ exit(EXIT_SUCCESS);
+ return 0; /* never reached */
+ }