Character Names:
Donnie Yen ... Zi Long
Andy On Chi-Kit ... Sunny
Jing Tian ... Fang Jing
Ngai Sing ... Xiong

Actor:
Ronald Cheng Chung-Kei ... Captain Zhang

http://hkmdb.com/db/movies/view.mhtml?i ... ay_set=eng

Synopsis
Zi Long (Donnie Yen) has been an infiltrating cop in Xiong’s (Collin Chou) Hong Kong mafia clan for many years. The failure of his recent negotiation on behalf of Xiong with the other three local clans makes Xiong suspicious of Zi Long’s identity. Xiong sets to wipe out every undercover in his gang. Sensing the danger, Zi Long requests an end to his undercover career from his supervisor Sir Zhang (Ronald Cheng). However, Zhang sends Zi Long to Mainland China to infiltrate a business of “Special Identity” trading instead. The business is run by Xiong’s best protégé Sunny (Andy On) who was Zi Long’s previous buddy in the gang. Zhang promises to reinstate Zi Long’s Police identity in conclusion of the mission once Sunny’s business is broken down. Zi Long agrees, joining local Police Officer Lei Peng (Zhigang Yang) and Fang Jing (Jing Tian) in the force.

Done !

Thank You very much !

New additions:

Saw some behind the scenes videos of Special IDs action scenes:

These two names can be added under Assistant Action Directors
Tanigaki Kenji (longtime Yen Stunt Team member)
John Salvitti (MMA consultant on Yen's team and longtime real-life friend of Yen)

Added.