This issue seems to be solved by manually editing the cintanotes.settings file and setting the value of app.mainframe.notetextfont.face from the former chinese character string to the font's english name "SimSun".
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Hi!
I meet some trouble with font display.
I've set the note text font to Simsun, the default chinese font on windows.
There's no problem with chinese characters, of course.
But everytime I append some roman letters into a new note, or edit a previously saved note, the trouble shows up.
Not only roman letters, but also some trouble with digits and symbols, which seems a little bit more subtle.
Below are 2 screenshots to describe my problem:

Newly inputted Letters are not displayed in customized font.

After save&re-open, they are displayed correctly.
The problem with digits and symbols is somewhat subtle...
Where does the problem lie?
(well, I know there also must be some BUGS with my English...

Greets
Eric.