William Chan acts Genghis Khan in his new film

Hong Kong singer/actor William Chan Wai-ting has decided to take on a new challenge, portraying legendary Mongolian hero Genghis Khan.

Hong Kong singer/actor William Chan Wai-ting promotes his new film "Genghis Khan" in Shanghai on Saturday, June 17, 2017. [Photo provided to China Plus]

The upcoming 3D film "Genghis Khan" centers on the hero during his younger years.

Hong Kong singer/actor William Chan Wai-ting promotes his new film "Genghis Khan" in Shanghai on Saturday, June 17, 2017. [Photo provided to China Plus]

Speaking at an event in Shanghai on Saturday, Chan said the most difficult part was attempting to look like a professional horse rider.

Veteran Chinese actor Hu Jun promotes his new film "Genghis Khan" in Shanghai on Saturday, June 17, 2017. [Photo provided to China Plus]

"Genghis Khan" stars Chan along with veteran actor Hu Jun and young actress Lin Yun.

Actress Lin Yun promotes her new film "Genghis Khan" in Shanghai on Saturday, June 17, 2017. [Photo provided to China Plus]

Renowned French filmmaker Jean-Jacques Annaud is the film's production supervisor. Annaud also supervised the film "Wolf Totem."

"Genghis Khan" is due to hit theatres in China on December 22, 2017.