Apply for H1B after Filing I-140

I'm currently working at a University on J1 and have obtained the J waiver. Now I want to switch to H1B (sponsored by the same employer)
I just submitted the I-140 form and plan to traveled back to China after changing of status to H1B. But I also need to get a new visa stamp at the consulate to reenter the U.S.
My plan is to submit I-485 after I come back from China. And I want to know if my plan sounds alright?
Rumors say I can't obtain H1B visa stamp in China after filing I-485. But could filing I-140 affect that as well? Just to be extra cautious! Any ideas?

to Danny:

I'm not sure what your question is because that sounds like a very good plan.
H1B is a dual intent visa so there should not be any problem with filing I-140 beforehand.

to Danny:

This time rumors are right. You cannot obtain H1B visa stamp outside of the states after filing I-485.