I bought a rolling backpack in China, the best of both worlds. Here are some tips:
1. Everything is pretty cheap in China. So you can pick up more luggage along the way. Buy shoes if you need a second pair because of wet weather. Get a shirt or blouse and throw away later. Shop in Walmart, Carrefours etc. as they have larger sizes.
2. Think of dressing in layers to stay warm, so leave your winter coat at home. T-shirt, shirt or blouse, sweater and then windbreaker keep you very warm.
3. Bring along some powered detergent for your night-time soaking and rinsing of socks, underwear, etc. Roll up with towels and twist to speed drying.
4. Shop at TravelSmith or Wintersilks to get some practical silk things and easily washed fabrics. I can wash a shirt at night and wear the next day after hanging on the cord above the tub.
5. Every hotel above 2 stars has a ironing board and iron in the closet to help keep you neat.
6. Leave your whites at home. You do not want to fool around with bleach, and the Chinese water has a rusty tinge to it some places.
Plan each "outfit" and leave behind anything you cannot wear often. I stay in earthtones for the entire trip and everything matches. It gets boring, but i do not have a heart attack getting to the airport or train station.