sorry, still can't get it to work. 

[luoyi@myhost ~/tex]$ mtxrun --script fonts --list --all --pattern=adobe |grep -i song
adobesongstd             adobesongstdlight       /usr/share/fonts/adobe/AdobeSongStd-Light.otf
adobesongstdlight        adobesongstdlight       /usr/share/fonts/adobe/AdobeSongStd-Light.otf
adobesongstdregular      adobesongstdlight       /usr/share/fonts/adobe/AdobeSongStd-Light.otf
[luoyi@myhost ~/tex]$ which luatex
/usr/local/texlive/2010/bin/x86_64-linux/luatex
[luoyi@myhost ~/tex]$ luatex lf.tex 
This is LuaTeX, Version beta-0.63.0-2010090921 
 restricted \write18 enabled.
(./lf.tex
! Font \asong=AdobeSongStd-Light at 10pt not loadable: metric data not found or
 bad.
<to be read again> 
                   \asong 
l.3 \asong
          
! Emergency stop.
<to be read again> 
                   \asong 
l.3 \asong
          
!  ==> Fatal error occurred, no output PDF file produced!
Transcript written on lf.log.
[luoyi@myhost ~/tex]$ head lf.tex 
% \input {luaotfload.sty}
\font\asong={AdobeSongStd-Light} at 10pt
\asong
women
\font\couri={CourierStd} at 10pt
\couri
women
\bye



2010/9/16 Li Yanrui (ÀîÑÓÈð) <liyanrui.m2@gmail.com>
2010/9/14 taco <taco@elvenkind.com>:
> Hi,
>
> See forward. Can somebody try this with current versions
> and possibly report back to the reporter? I am at the
> ConTeXt meeting which makes working at bugs sort of
> problematic  and besides, I do not really understand
> luaotfload all that well.
>
> Thanks in advance,
> Taco
>
>
> The following issue has been SUBMITTED.
> ======================================================================
> http://tracker.luatex.org/view.php?id=481
> ======================================================================
> Reported By:                luoyi
> Assigned To:
> ======================================================================
> Project:                    luatex
> Issue ID:                   481
> Category:                   luatex bug
> Reproducibility:            always
> Severity:                   major
> Priority:                   high
> Status:                     new
> ======================================================================
> Date Submitted:             2010-09-14 10:52 CEST
> Last Modified:              2010-09-14 10:52 CEST
> ======================================================================
> Summary:                    can't load chinese otf font correctly, always
> give
> "LuaTeX warning: lua-loaded font has no characters"
> Description:
> I'm using TL2010 with the latest luatex , and it looks like luatex can't
> load
> chinese otf font correctly. It always give error msg like" LuaTeX warning:
> lua-loaded font has no characters". hope we can solve it.
>
> the tex file is:
>
> \input {luaotfload.sty}
> \font\asong={AdobeSongStd-Light} at 10pt
> \asong
> women
> \bye
>

Now the LuaTeX/plain TeX can works with the latest beta. Because I
have not the LaTeX enviroment, I just tested this example:

\font\asong={AdobeSongStd-Light} at 10pt
\asong
²âÊÔ
\bye

It can work. LuaTeX can find AdobeSongStd-Light.otf rightly and load it.

--
Best regards,

Li Yanrui (ÀîÑÓÈð)
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