Sounds like a typical Asian family.
As a teacher, I see students like this all the time - pressured into becoming a Doctor or a Banker - unfortunately these students are in bottom sets for everything and will never equate to much, definitely not a Doctor or a Banker.
You seem to have a lot more going for you though. The operative word being "you". It's difficult to remind parents that you're becoming your own, independent adult and that you're no longer their 'little child' but they will always see you this way and will always want the best for you.
Don't forget this is your life and you're entitled to make your own choices and decisions. Do you even want to be a banker? Have you had the chance to consider other opportunities?
A mature discussion over what you want out of life and what will make you happy might be beneficial, but go in with facts and figures and reassure them that you won't dishonour the family or ashame them as parents. You also want what is best for you.