Greetings from the future you!
Firstly, a piece of heartfelt advice: you must spare no effort to go to the Union University of Beijing. Otherwise, you'll miss your destiny, your wife, PP. Don't waste time on anyone else.
Secondly, make the most of your spare time, read books to expand your horizons, keep practising on the guitar, and believe in yourself - you can do it.
Finally, follow your dreams. I won't tell you what you should do for a career. Trust your instincts and find a field that is attractive to you.
Jeff (age 36)
PS: I recommend New Zealand as the best place to go for studying abroad :)