From the sound of it the number one danger on this trip is someone driving into you. Either a big truck on the backroads of the Pamirs or an inattentive driver in Chinese traffic. So it is vital that people know you are there.
I’ve added spotlights (Touratech) and a high intensity headlamp (HID-50). A high volume air horn should make people take notice. On the passive side, I have covered the back and sides of my panniers with reflective film (like they put on police cars) which really stands out.