There is a tradition in Chinese martial arts movies where people strong in "qi" power can jump around light as a feather, fight in treetops, and do other superhuman feats. (Example: Crouching Tiger, Hidden Dragon.) There is plenty of that in this movie, and additionally some characters seem to have special powers that other qi masters don't have, making this in some ways like a Western superhero comic story.
My favorite character was the girl who is stuck in a wheelchair, but whose qi powers are strong enough that she is far from useless in a fight. Her name is Yayu but her nickname is "Emotionless". Like Jedi in Star Wars movies can detect each other, she can also detect other nearby qi masters. Another IMDb user review speculates that she is simply a ripoff of two characters from X-Men, but I don't agree.
The movie has a confusing start, but if you stick with it the characters and plot sort themselves out. There is a shifty criminal in a city, and it turns out that three different groups have their eye on him: the police of "Department 6", the undercover police of "The Divine Constabulary", and some mysterious assassins. Additionally a bounty hunter is after him. The initial action is confusing, as it's not clear who is who. But stick with it, and the end of the movie pays off pretty well.
This movie also has a bit of a "steampunk" vibe, with unreasonably advanced clockwork mechanisms that might be partly qi-powered. For no obvious reason there is a giant clockwork crane that Emotionless uses to reach scrolls on the high shelves of a bookcase! And mid-way through the movie, Emotionless gets a nifty upgraded wheelchair that proves useful at the end of the movie.
At nearly two hours it runs a bit longer than necessary; I can think of a few cuts that would not have hurt. Still, I give this a 7 on the 10 scale. If you like fantasy martial- arts you might want to add a point to that! Also, I really liked the music.
Note: some plot threads are left unresolved, setting up for possible sequels, but this movie has a pretty satisfying ending.