Thanks for your info. You have some pluses and minuses within your story, as you can probably imagine.
The Chinese major, international experience, athletics/extracurricular activities, and even to a degree potentially the start-up experience, all work for you. The GPA is a downer, and depending on how you explain all of your story to date, it could work or it could be questioned or confusing.
And then there is the unknown of the GMAT, though if you successfully get the scores you are describing that will help with the doubt surrounding the GPA and your overall chances.
Your school list isn't necessarily out of the question; likely Duke, Cornell & UCLA may be the tougher ones for you. The others seem within reach if you are able to successfully get your story across within your applications. You may benefit from assistance to ensure your story makes sense and flows, so consider either an admissions consultant or at least getting feedback from a friend or colleague, preferably who knows b-schools well.
If you are interested we do a free 30 min consult to get some more feedback and your q's answered.
Wishing you the best!
mbaMission Insiders Guides: http://www.mbamission.com/guides.php?category=insiders
Free Consultation: http://www.mbamission.com/consult.php