A common method to replace the ideographic fullstop (
。) with fullwidth fullstop (
．) is to change the catcode:
\catcode`\。 = \active \let。=．
However, this method will break when using
CJK package with pdfLaTeX since this package has already made
。 to be a macro. So how to achieve this effect with
PS: I use UTF8 encoding.