The film is shot in color with all the sets and costumes designed in the tones of black and white, to illustrate the interplay between light and dark and to follow the style of Chinese ink wash paintings.
While not a direct representation of History, the events are equivalent to the invasion of the Jing Province in the Three Kingdoms period. This includes details like the marriage proposal.
It never stops raining in the film. Yimou Zhang specifically chose to film on days when it was/had been raining.
The film's premiere was at TIFF in Toronto in September 2018.