Donnie Yen Chi Tan will face off against a serial killer played by Wang Baoqiang in his new film.According to a report on Mingpao, the film, entitled Yut Gor Yun Dik Mo Lum (The Martial World of One Person), will also star Charlie Yeung Choi Nei and Bai Bing. The film starts production at the end of the month and shoot mainly in Hong Kong and Foshan with production budget of HK$190 million. The story will be about police martial art coach Yen Chi Tan who accidentally kills someone over a personal issue and finally is sentenced to prison. In order to regain his freedom, he assists the police in capturing the Wang Baoqiang played serial killer. Donnie has worked with Wang Baoqiang in the past before, and said that his skills have improved, with his acting reaching another level.