Donnie Yen studied China Wushu with his mother Bow Sim Mark since childhood, and then practiced free fighting in Shichahai and Wu Bin, which has certain actual combat ability. His boxing speed is faster, but it can't be like in the movie, because it is a special effect. As the most senior commentator in China, Lao Liang (Liang Hongda was the editor-in-chief of Jason Wu Boxing and Fighting) made an objective analysis. If you are interested, you can enter "Lao Liang Watching TV: Real Kung Fu Donnie Yen Real Kung Fu" in Baidu video.