Re:A duo who documented the birth of NYC’s subway
by mxuribe on Sunday March 08, 2020 @03:00PM
(#22519822)
Ah-ha, weird, after immediately seeing the flag, I went to Wikipedia...but on the Chinese flags page they didn't list the flag that you found...which does answer the mystery for me! Thanks!
https://en.wikipedia.org/wiki/Five_Races_Under_One_Union