Factual error: In the scene where Mei is bathing in that small pool, you can see on her arm a the scar from her vaccination. As you might expect, they didn't have these vaccinations in the 1800s.
House of Flying Daggers (2004)
1 factual error - chronological order
Directed by: Yimou Zhang
Starring: Ziyi Zhang, Andy Lau, Takeshi Kaneshiro, Dandan Song
Continuity mistake: Right before the final battle, Leo hits Mei with a dagger to the chest. During the ensuing conversation she frequently goes from having a bloody mouth with red teeth, to having a clean mouth with no signs of blood on her teeth.
Trivia: Zhang Ziyi spent two months living alongside a twelve-year-old blind girl to prepare for her role as Mei.