I could give you a list what Chinese received from Russia after 1938
I for one would be interested in that information (in broad terms)!
Note that materiel arriving at Rangoon in Sep/Oct 1939 would have been shipped before Britain and Germany were at war. It's an interesting question as to what the British customs officers at the Rangoon docks would have made of it (wouldn't they have impounded the freighter, or was it neutral?)! And just because it arrived is no evidence that it was forwarded up the "road" to Kunming. Was the Burma Road even open in the early fall of 1939?
But really, the British has a motive to let it travel onward--it cost them nothing, put China in their debt, and benefited Germany not at all.
Blue skies! -- Dan Ford
Coming August 21:
Flying Tigers: Claire Chennault and His American Volunteers, 1941-1942