>>279575886
There's this wuxia writer called Huang Yi and he's known for infusing sci-fi elements including time travel in his works. Not as famous as Urobuchi's favorite author, Gu Long, but still prominent enough to have his work adapted into live action.
https://en.wikipedia.org/wiki/A_Step_into_the_Past

Basically, time traveling wuxia is more likely than you think.