Depends on what you are going to do when you go to China. If you are stationary at a place and maximum doing weekend trips or something, this combination might work.
If you are planning on traveling extensively esp with buses and trains, you are better off with a different combination of a full size backpack (check in) and a smaller messenger bag or something with you. The point is you need something that can be on you or close to you at all times
And the Rimowa will attract thieves.