I agree with previous post that fuel suppliers/producers should be a point of focus. This flight was from Bejing, very light passenger load, and obviously parked at high altitude for a considerable time. I remember a bulletin issued to pilots and dispatchers at my old airline that forbade the use of polar routes to North America, due to the lower quality fuel available in China, Bejing in particular. We routed over central Siberia and Alaska without incident (B-777's) but no further north. Evidently lab tests conducted on some fuel samples from China revealed a variation in fuel freeze points that was disturbing (at the time).