U should probably study Mandarin in International business and It's useful for u to develop ur career . Good luck :)

i think mandarin chinese is more important in china .becase most persons who can speak cantonese chinese can speak mandarin chinese .the mandarin chinese is the offcial language in chinese .mandarin chinese called"普通话”in chinese 。“普通话” means the language which used by most people in china .

i have completed this subject....

probably Mandarin. we know Canton is a business center, and then most business person understand Mandarin. Mandarin is becoming more important nowdays.

If you are using it purely for business, I would definitely recommend you to study Mandarin. Most Cantonese speakers today would be able to speak Mandarin anyway.