The route is as WHBM states, almost without exception. At this time of year, the majority of the flight is at night whether you're on the VS200 (2130 dep) or the VS238 (1600 dep). Even more so on the way back! So you're not going to see a lot, really. On the VS200, if you're on the right hand side, you may get a good view of Mongolia, the Gobi desert and the eastern Himalaya (Qilian Shan, Bayan Har Shan, and Tanggula Shan) between Lanzhou and Chengdu.