The vehicle was used to transport Harrison Forman and his group on their trip to Yanan. This image is of the bus being loaded on a flatbed train car at Lintong train station before the group makes their way to Tongchuan.
Related Resources
Forman, H. (1946). Report from Red China. London: Robert Hale Limited.; Harrison Forman Diary, China, May-June 1944, Part 1 available at http://collections.lib.uwm.edu/u?/forman,51