Hiya, Jennifer. Welcome to the forum, from another new guy. I'm one step behind you in the job-hunting process, still contacting places and trying to find a good school, but Changchun is on my list as well. If I find a really good place, I will go there for my first job. I'd be interested to hear your experiences once you get there. If you have a blog, I'd love to read it.
I also read Changchun has a lot of great Mandarin programs, everything from the universities to private schools, so I hope you're looking to pick up some Mandarin!