It said Lau didn't take part in the scene and that the star is due to start filming his scenes later this week.
The film, set in ancient China and based on a Japanese comic, has drawn investments from China, Japan, South Korea and Hong Kong totaling up to US$12.4 million, the Shanghai Youth Daily reported.
Turning his attention to Japan movie legend Clint Eastwood is making two new movies about the World War II battle for the island of Iwo Jima, one from the US point of view and the other from the Japanese.
Eastwood revealed he was planning a second Iwo Jima film giving the other side of the story as told in his Flags of Our Fathers, he said in an interview in this week's edition of Time magazine.
In a rare move in Hollywood, the counter-balanced movies will be released simultaneously late next year.
Legally embattled Hollywood actor Tom Sizemore won a reprieve from jail time earlier this week when a judge suspended his 16-month prison sentence and reinstated probation imposed for a drug offence.
But Los Angeles Superior Court Judge Paula Adele Mabrey warned the troubled actor that he would find himself behind bars if he flouted the conditions of his probation.
"I have seen remarkable improvement ... I believe that you know what you need to do to stay out of prison, sir, and I believe you can do it," she said.
Judge Mabrey last July revoked Sizemore's probation and confined him to a drug rehabilitation centre for at least two months after he admitted violating probation by attempting to fake a urine drug test by using a prosthetic device.
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