Donnie Yen Chi Tan worked on his new film, Special ID, as the action director and designed different fighting styles with different actors.
Playing a rival, Jing Tian had a slap scene, which Donnie Yen added in.
He admitted that at first he was afraid that working with Jing Tian on her first action film would be very difficult, because of the high expectations he had of the female actress portraying the role.
However, Donnie said Jing Tian improved rapidly.
To make her personality stand out even further, Donnie allowed her to slap him in a scene and also demonstrated many moves for her to study.
Jing Tian praised Donnie's work and said he personally saw to every detail.
She said: "If he wasn't strict enough, many exciting scenes might not be here."