I'm going abroad to beijing from February to May

so obviously space is an issue when packing. I go to school in Madsacheusetts, so I'm used to bitter winters and not having the snow melt until late March. Is it worth the space in my suitcase to pack my down parka, or should I just work with layers of sweaters and shirts that I'll be packing anyway? If it will warm up quickly and not storm with snow, I'm wondering what is the best course to take.