What parameters should I use to http://radioscanningtw.jidanni.org/api.php to get the same results as http://radioscanningtw.jidanni.org/index.php?title=Special:Categories&of... I.e., all categories (whose category pages MAY be empty), whose names start with "5"?
Or how about just how to emulate http://radioscanningtw.jidanni.org/index.php?title=Special:Categories ?