I am using windows 7 64bit with SP1, English edition. Non-unicode setting already set to Chinese(RPC). If I create a txt file, I can input Chinese char and display correctly.
However, In Matlab 2013a, I set font to "Segoe UI". If I input Chinese char, it display as square, which mean matlab cannot show chinese char.
I did not meet this issue in 2012b at least.
Try this in your code
feature('DefaultCharacterSet', 'UTF8') %# for Chinese Character support
Note:- that UTF-8 can be used for all languages and is the recommended charset on the Internet.