Which subject can gain money??
but do not so busy,
i hope i can enjoy the school life  here

有一科可以賺錢架咩?

i mean the further future!

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if you don't want to be so busy, take HKU BBA, but don't major in accounting. People in accounting firms work like a dog.
There may not be a definite choice that suits your needs, but definitely the following subjects are not suitable for you:
1. Medicine
2. Engineering
3. Science
These are busy subjects. So never study these if you want to enjoy your u-life.

How can i study global bussiness,
isn't difficult...