Here you will see a mix of raw UTF-8, raw big5, all in the same file.
The raw big5 works fine, but the raw UTF-8 looks garbled, in the summary
buffer. In the article buffer, all look fine.

Here are all my config files:
https://www.jidanni.org/comp/configuration/.emacs
https://www.jidanni.org/comp/configuration/.gnus.el
https://www.jidanni.org/comp/configuration/.emacs-custom.el
https://www.jidanni.org/comp/configuration/.emacs-w3m