Hi Bucko, hope you are well and enjoying your trip!

I just came back to the Jing from Qinhuangdao/Shanhaiguan. My advice: don't take G102 from QHD to BJ. It is a dirty road mainly used by trucks. It can be fast. I managed to do it in 7 hours, riding 2 up on a 150cc bike but if you can afford the time, take a more northernly route (S355, S251) with considerably less traffic and much nicer landscape. If you still want to take G102, hop on to the Expressway around Jixian because the last stretch is mainly urban environment with a lot of red lights and heavy traffic.