There are few key elements you must have in this T-Shirt
(1) Carnegie Mellon (Word)
- same font as in http://www.cmu.edu
- color must be in red color (CMU color)
(2) Taiwan (Word)
- you should play around with the font (try warp text in photoshop for different effect)
- color - try to use green-ish color
You should play around with the size of the font as well for both Carnegie Mellon word and Taiwan word to fit T-Shirt for a better design. From there you'll need to come out with a design - perhaps adding some graphics.
The past attempt for the graphics design has been involved with using the shape of Taiwan (available in google) and flowers and tweaking around with it. You can also pursue this way but it is strongly suggest that you come out with something creative.
The background color for the T-Shirt should be white/light grey/grey.
The final submission file should be in gif,bmp, and psd file.
The rest is all yours ~