You made your own plan,why do you worry about others' crosscurrents?I rode JH600,took 7hours from BJ to QingDao,of course on highway,so,I believe in your 13hours trip from SH to BJ,even though it's illegal riding on highway,but we do have methods to deal with it,you guys know how ,right buddies?

But,you SHOULD listen to the good suggestions,like Chinabiker's,it's so reasonable......

BTW,BJ is one of the city which allows motorcycle to ride on highway...

Take care,focus on your trip.

Cheers!
Lion.