Transiting through Beijing to DPRK and then back through Beijing.

Hi, Thank you for providing this service.

I will arrive in Beijing on the 15th of may and depart to DPRK from PEK on the 17th of may. I will then be transiting back through PEK and staying for one more day in Beijing on the return from DPRK. Does the time re-start once I depart china and re-arrive, I assume?

Thank you.