The only thing I can assure you is that IT won't die in 4 years. 1) Not all the Chinese immigrants are doing IT jobs; 2) Not all Chinese immigrants who want to do IT jobs have succeeded; 3) Not all Chinese IT professionals earn a high salary; 4) Not all Chinese immigrants are interested in IT jobs though the salary is high.....I cannot imagine how you afford severals years to learn IT.
In addition, can you afford the tuition in Canada? I know there are some loans... but but that's not enough.

I cannot help you to choose a road for your life. If I do this, you may blame on me in the future.