RZA directed, co-wrote and stars in The Man with the Iron Fists as a man who builds weapons to save his village from a villainous traitor.
Discussing the martial arts film, Liu particularly praised RZA for his dedication to authenticity.
"I loved working with [RZA] because he was incredibly calm as a director. On set you had the ability to see how many inspirations he had with this movie," Flicks and Bits quotes Liu as saying.
The actress further explained: "For him to go into a movie that was a period piece and that was also shooting in China, it was a really big thing to take on. He could have done it in America and done something that was more current and more modern, but instead he really had this vision of something that he had been thinking about for a very long time.
"Obviously it was very emoted in his music and he carried that vision through. I have to say, most people don't have the ability to do that: to start at A and end at Z. And he really did that. It was incredibly inspiring working with him."
Russell Crowe, Cung Le, Jamie Chung and Rick Yune also appear in The Man with the Iron Fists, opening on Friday, November 2 in the US and December 7 in the UK.
It was reported this week that RZA's next directorial project could be a Genghis Khan biopic.
> Black Keys, RZA collaborate on Man with the Iron Fists OST - listen
Watch the trailer for The Man with the Iron Fists below (warning - adult content):