Dear Hans,
I found that ConTeXt injected two infinity penalties between
a close punctuation and a open punctuation, for example 
between `”“`, or `：“`, as showed in the following Chinese
document. But actually, we need to break between them sometime. 
Please note that there is no space around full width 
punctuations in Chinese document.
```lmtx
\setscript[hanzi]
\usetypescriptfile[mscore]
\usebodyfont   [mschinese,20pt]

\showframe

% just for watching node list
% \startluacode
%     local watch = require("watch_sys_actions.lua")
%     watch.register()
% \stopluacode

\starttext

\dorecurse{5}{“好？！；”“：，。”} % linebreak sutck

\dorecurse{30}{“我”} % linebreak sutck

\dorecurse{30}{我} % linebreak work

\dorecurse{30}{我。} % linebreak work

\stoptext
```

What I see between any two consecutive punctuations is

<penalty userpenalty>       10000
<glue userskip>             0       0       655500
<penalty userpenalty>       10000
<glue userskip>             0       655500  0

so nowhere to linebreak.


                              Huang Fusyong(黄复雄)