Hey mate
Trekking away hey? What's the occasion?!
How east are you going? Are you going near Shanghai? If so you can visit GM head office (Jiangsu, Changzhou Pr) LOL but its a fair drive
Ningbo is nice too. China is a big place man. Make sure anything you buy you take it out of any packaging and hide the receipts so you won't need to declare it. But that's standard.
If you are trying to get the most in out of the travel, try to getting the most out of your day out and about, then sleep at night on transport to your next destination.
I did 16 countries in 2 months a year or so ago it's worth exhausting yourself for the memories